diff --git a/frontend/jest.config.ts b/frontend/jest.config.ts
index 29cf32d131fb..07c6d67e2230 100644
--- a/frontend/jest.config.ts
+++ b/frontend/jest.config.ts
@@ -16,6 +16,7 @@ const config: Config.InitialOptions = {
 		'ts-jest': {
 			useESM: true,
 			isolatedModules: true,
+			tsconfig: '<rootDir>/tsconfig.jest.json',
 		},
 	},
 	testMatch: ['<rootDir>/src/**/*?(*.)(test).(ts|js)?(x)'],
diff --git a/frontend/src/components/AppLoading/__tests__/AppLoading.test.tsx b/frontend/src/components/AppLoading/__tests__/AppLoading.test.tsx
index 4e37ddb4591c..b9c6827345af 100644
--- a/frontend/src/components/AppLoading/__tests__/AppLoading.test.tsx
+++ b/frontend/src/components/AppLoading/__tests__/AppLoading.test.tsx
@@ -1,14 +1,16 @@
 import { render, screen } from '@testing-library/react';
 
+import getLocal from '../../../api/browser/localstorage/get';
 import AppLoading from '../AppLoading';
 
-// Mock the localStorage API
-const mockGet = jest.fn();
-jest.mock('api/browser/localstorage/get', () => ({
+jest.mock('../../../api/browser/localstorage/get', () => ({
 	__esModule: true,
-	default: mockGet,
+	default: jest.fn(),
 }));
 
+// Access the mocked function
+const mockGet = (getLocal as unknown) as jest.Mock;
+
 describe('AppLoading', () => {
 	const SIGNOZ_TEXT = 'SigNoz';
 	const TAGLINE_TEXT =
diff --git a/frontend/src/components/QueryBuilderV2/__tests__/utils.test.ts b/frontend/src/components/QueryBuilderV2/__tests__/utils.test.ts
index 6e30c69ab338..08e256f015bd 100644
--- a/frontend/src/components/QueryBuilderV2/__tests__/utils.test.ts
+++ b/frontend/src/components/QueryBuilderV2/__tests__/utils.test.ts
@@ -1,9 +1,19 @@
 /* eslint-disable sonarjs/no-duplicate-string */
+/* eslint-disable import/no-unresolved */
+import { negateOperator, OPERATORS } from 'constants/antlrQueryConstants';
 import { TagFilter } from 'types/api/queryBuilder/queryBuilderData';
+import { extractQueryPairs } from 'utils/queryContextUtils';
 
-import { convertFiltersToExpression } from '../utils';
+import {
+	convertFiltersToExpression,
+	convertFiltersToExpressionWithExistingQuery,
+} from '../utils';
 
 describe('convertFiltersToExpression', () => {
+	beforeEach(() => {
+		jest.clearAllMocks();
+	});
+
 	it('should handle empty, null, and undefined inputs', () => {
 		// Test null and undefined
 		expect(convertFiltersToExpression(null as any)).toEqual({ expression: '' });
@@ -533,4 +543,229 @@ describe('convertFiltersToExpression', () => {
 				"user_id NOT EXISTS AND description NOT CONTAINS 'error' AND NOT has(tags, 'production') AND NOT hasAny(labels, ['env:prod', 'service:api'])",
 		});
 	});
+
+	it('should return filters with new expression when no existing query', () => {
+		const filters = {
+			items: [
+				{
+					id: '1',
+					key: { id: 'service.name', key: 'service.name', type: 'string' },
+					op: OPERATORS['='],
+					value: 'test-service',
+				},
+			],
+			op: 'AND',
+		};
+
+		const result = convertFiltersToExpressionWithExistingQuery(
+			filters,
+			undefined,
+		);
+
+		expect(result.filters).toEqual(filters);
+		expect(result.filter.expression).toBe("service.name = 'test-service'");
+	});
+
+	it('should handle empty filters', () => {
+		const filters = {
+			items: [],
+			op: 'AND',
+		};
+
+		const result = convertFiltersToExpressionWithExistingQuery(
+			filters,
+			undefined,
+		);
+
+		expect(result.filters).toEqual(filters);
+		expect(result.filter.expression).toBe('');
+	});
+
+	it('should handle existing query with matching filters', () => {
+		const filters = {
+			items: [
+				{
+					id: '1',
+					key: { id: 'service.name', key: 'service.name', type: 'string' },
+					op: OPERATORS['='],
+					value: 'updated-service',
+				},
+			],
+			op: 'AND',
+		};
+
+		const existingQuery = "service.name = 'old-service'";
+
+		const result = convertFiltersToExpressionWithExistingQuery(
+			filters,
+			existingQuery,
+		);
+
+		expect(result.filters).toBeDefined();
+		expect(result.filter).toBeDefined();
+		expect(result.filter.expression).toBe("service.name = 'updated-service'");
+		// Ensure parser can parse the existing query
+		expect(extractQueryPairs(existingQuery)).toEqual(
+			expect.arrayContaining([
+				expect.objectContaining({
+					key: 'service.name',
+					operator: '=',
+					value: "'old-service'",
+				}),
+			]),
+		);
+	});
+
+	it('should handle IN operator with existing query', () => {
+		const filters = {
+			items: [
+				{
+					id: '1',
+					key: { id: 'service.name', key: 'service.name', type: 'string' },
+					op: OPERATORS.IN,
+					value: ['service1', 'service2'],
+				},
+			],
+			op: 'AND',
+		};
+
+		const existingQuery = "service.name IN ['old-service']";
+
+		const result = convertFiltersToExpressionWithExistingQuery(
+			filters,
+			existingQuery,
+		);
+
+		expect(result.filters).toBeDefined();
+		expect(result.filter).toBeDefined();
+		expect(result.filter.expression).toBe(
+			"service.name IN ['service1', 'service2']",
+		);
+	});
+
+	it('should handle IN operator conversion from equals', () => {
+		const filters = {
+			items: [
+				{
+					id: '1',
+					key: { id: 'service.name', key: 'service.name', type: 'string' },
+					op: OPERATORS.IN,
+					value: ['service1', 'service2'],
+				},
+			],
+			op: 'AND',
+		};
+
+		const existingQuery = "service.name = 'old-service'";
+
+		const result = convertFiltersToExpressionWithExistingQuery(
+			filters,
+			existingQuery,
+		);
+
+		expect(result.filters.items).toHaveLength(1);
+		expect(result.filter.expression).toBe(
+			"service.name IN ['service1', 'service2'] ",
+		);
+	});
+
+	it('should handle NOT IN operator conversion from not equals', () => {
+		const filters = {
+			items: [
+				{
+					id: '1',
+					key: { id: 'service.name', key: 'service.name', type: 'string' },
+					op: negateOperator(OPERATORS.IN),
+					value: ['service1', 'service2'],
+				},
+			],
+			op: 'AND',
+		};
+
+		const existingQuery = "service.name != 'old-service'";
+
+		const result = convertFiltersToExpressionWithExistingQuery(
+			filters,
+			existingQuery,
+		);
+
+		expect(result.filters.items).toHaveLength(1);
+		expect(result.filter.expression).toBe(
+			"service.name NOT IN ['service1', 'service2'] ",
+		);
+	});
+
+	it('should add new filters when they do not exist in existing query', () => {
+		const filters = {
+			items: [
+				{
+					id: '1',
+					key: { id: 'new.key', key: 'new.key', type: 'string' },
+					op: OPERATORS['='],
+					value: 'new-value',
+				},
+			],
+			op: 'AND',
+		};
+
+		const existingQuery = "service.name = 'old-service'";
+
+		const result = convertFiltersToExpressionWithExistingQuery(
+			filters,
+			existingQuery,
+		);
+
+		expect(result.filters.items).toHaveLength(2); // Original + new filter
+		expect(result.filter.expression).toBe(
+			"service.name = 'old-service' new.key = 'new-value'",
+		);
+	});
+
+	it('should handle simple value replacement', () => {
+		const filters = {
+			items: [
+				{
+					id: '1',
+					key: { id: 'status', key: 'status', type: 'string' },
+					op: OPERATORS['='],
+					value: 'error',
+				},
+			],
+			op: 'AND',
+		};
+
+		const existingQuery = "status = 'success'";
+
+		const result = convertFiltersToExpressionWithExistingQuery(
+			filters,
+			existingQuery,
+		);
+
+		expect(result.filters.items).toHaveLength(1);
+		expect(result.filter.expression).toBe("status = 'error'");
+	});
+
+	it('should handle filters with no key gracefully', () => {
+		const filters = {
+			items: [
+				{
+					id: '1',
+					key: undefined,
+					op: OPERATORS['='],
+					value: 'test-value',
+				},
+			],
+			op: 'AND',
+		};
+
+		const existingQuery = "service.name = 'old-service'";
+
+		const result = convertFiltersToExpressionWithExistingQuery(
+			filters,
+			existingQuery,
+		);
+
+		expect(result.filters.items).toHaveLength(2);
+		expect(result.filter.expression).toBe("service.name = 'old-service'");
+	});
 });
diff --git a/frontend/src/components/QueryBuilderV2/utils.ts b/frontend/src/components/QueryBuilderV2/utils.ts
index 49f6b8988de1..2abca6d239b6 100644
--- a/frontend/src/components/QueryBuilderV2/utils.ts
+++ b/frontend/src/components/QueryBuilderV2/utils.ts
@@ -6,7 +6,7 @@ import {
 	QUERY_BUILDER_FUNCTIONS,
 } from 'constants/antlrQueryConstants';
 import { getOperatorValue } from 'container/QueryBuilder/filters/QueryBuilderSearch/utils';
-import { cloneDeep } from 'lodash-es';
+import { cloneDeep, isEqual, sortBy } from 'lodash-es';
 import { IQueryPair } from 'types/antlrQueryTypes';
 import { BaseAutocompleteData } from 'types/api/queryBuilder/queryAutocompleteResponse';
 import {
@@ -163,6 +163,19 @@ export const convertExpressionToFilters = (
 
 	return filters;
 };
+const getQueryPairsMap = (query: string): Map<string, IQueryPair> => {
+	const queryPairs = extractQueryPairs(query);
+	const queryPairsMap: Map<string, IQueryPair> = new Map();
+
+	queryPairs.forEach((pair) => {
+		const key = pair.hasNegation
+			? `${pair.key}-not ${pair.operator}`.trim().toLowerCase()
+			: `${pair.key}-${pair.operator}`.trim().toLowerCase();
+		queryPairsMap.set(key, pair);
+	});
+
+	return queryPairsMap;
+};
 
 export const convertFiltersToExpressionWithExistingQuery = (
 	filters: TagFilter,
@@ -195,24 +208,12 @@ export const convertFiltersToExpressionWithExistingQuery = (
 		};
 	}
 
-	// Extract query pairs from the existing query
-	const queryPairs = extractQueryPairs(existingQuery.trim());
-	let queryPairsMap: Map<string, IQueryPair> = new Map();
 	const nonExistingFilters: TagFilterItem[] = [];
 	let modifiedQuery = existingQuery; // We'll modify this query as we proceed
 	const visitedPairs: Set<string> = new Set(); // Set to track visited query pairs
 
 	// Map extracted query pairs to key-specific pair information for faster access
-	if (queryPairs.length > 0) {
-		queryPairsMap = new Map(
-			queryPairs.map((pair) => {
-				const key = pair.hasNegation
-					? `${pair.key}-not ${pair.operator}`.trim().toLowerCase()
-					: `${pair.key}-${pair.operator}`.trim().toLowerCase();
-				return [key, pair];
-			}),
-		);
-	}
+	let queryPairsMap = getQueryPairsMap(existingQuery.trim());
 
 	filters?.items?.forEach((filter) => {
 		const { key, op, value } = filter;
@@ -241,10 +242,37 @@ export const convertFiltersToExpressionWithExistingQuery = (
 				existingPair.position?.valueEnd
 			) {
 				visitedPairs.add(`${key.key}-${op}`.trim().toLowerCase());
+
+				// Check if existing values match current filter values (for array-based operators)
+				if (existingPair.valueList && filter.value && Array.isArray(filter.value)) {
+					// Clean quotes from string values for comparison
+					const cleanValues = (values: any[]): any[] =>
+						values.map((val) => (typeof val === 'string' ? unquote(val) : val));
+
+					const cleanExistingValues = cleanValues(existingPair.valueList);
+					const cleanFilterValues = cleanValues(filter.value);
+
+					// Compare arrays (order-independent) - if identical, keep existing value
+					const isSameValues =
+						cleanExistingValues.length === cleanFilterValues.length &&
+						isEqual(sortBy(cleanExistingValues), sortBy(cleanFilterValues));
+
+					if (isSameValues) {
+						// Values are identical, preserve existing formatting
+						modifiedQuery =
+							modifiedQuery.slice(0, existingPair.position.valueStart) +
+							existingPair.value +
+							modifiedQuery.slice(existingPair.position.valueEnd + 1);
+						return;
+					}
+				}
+
 				modifiedQuery =
 					modifiedQuery.slice(0, existingPair.position.valueStart) +
 					formattedValue +
 					modifiedQuery.slice(existingPair.position.valueEnd + 1);
+
+				queryPairsMap = getQueryPairsMap(modifiedQuery);
 				return;
 			}
 
@@ -270,6 +298,7 @@ export const convertFiltersToExpressionWithExistingQuery = (
 							)}${OPERATORS.IN} ${formattedValue} ${modifiedQuery.slice(
 								notInPair.position.valueEnd + 1,
 							)}`;
+							queryPairsMap = getQueryPairsMap(modifiedQuery.trim());
 						}
 						shouldAddToNonExisting = false; // Don't add this to non-existing filters
 					} else if (
@@ -286,6 +315,7 @@ export const convertFiltersToExpressionWithExistingQuery = (
 							)}${OPERATORS.IN} ${formattedValue} ${modifiedQuery.slice(
 								equalsPair.position.valueEnd + 1,
 							)}`;
+							queryPairsMap = getQueryPairsMap(modifiedQuery);
 						}
 						shouldAddToNonExisting = false; // Don't add this to non-existing filters
 					} else if (
@@ -302,6 +332,7 @@ export const convertFiltersToExpressionWithExistingQuery = (
 							)}${OPERATORS.IN} ${formattedValue} ${modifiedQuery.slice(
 								notEqualsPair.position.valueEnd + 1,
 							)}`;
+							queryPairsMap = getQueryPairsMap(modifiedQuery);
 						}
 						shouldAddToNonExisting = false; // Don't add this to non-existing filters
 					}
@@ -323,6 +354,7 @@ export const convertFiltersToExpressionWithExistingQuery = (
 							} ${formattedValue} ${modifiedQuery.slice(
 								notEqualsPair.position.valueEnd + 1,
 							)}`;
+							queryPairsMap = getQueryPairsMap(modifiedQuery);
 						}
 						shouldAddToNonExisting = false; // Don't add this to non-existing filters
 					}
@@ -335,6 +367,23 @@ export const convertFiltersToExpressionWithExistingQuery = (
 		if (
 			queryPairsMap.has(`${filter.key?.key}-${filter.op}`.trim().toLowerCase())
 		) {
+			const existingPair = queryPairsMap.get(
+				`${filter.key?.key}-${filter.op}`.trim().toLowerCase(),
+			);
+			if (
+				existingPair &&
+				existingPair.position?.valueStart &&
+				existingPair.position?.valueEnd
+			) {
+				const formattedValue = formatValueForExpression(value, op);
+				// replace the value with the new value
+				modifiedQuery =
+					modifiedQuery.slice(0, existingPair.position.valueStart) +
+					formattedValue +
+					modifiedQuery.slice(existingPair.position.valueEnd + 1);
+				queryPairsMap = getQueryPairsMap(modifiedQuery);
+			}
+
 			visitedPairs.add(`${filter.key?.key}-${filter.op}`.trim().toLowerCase());
 		}
 
diff --git a/frontend/src/container/LogsExplorerViews/tests/LogsExplorerViews.test.tsx b/frontend/src/container/LogsExplorerViews/tests/LogsExplorerViews.test.tsx
index 653fbbb5ddf6..aaeba0f654a4 100644
--- a/frontend/src/container/LogsExplorerViews/tests/LogsExplorerViews.test.tsx
+++ b/frontend/src/container/LogsExplorerViews/tests/LogsExplorerViews.test.tsx
@@ -151,7 +151,7 @@ jest.mock('providers/preferences/sync/usePreferenceSync', () => ({
 
 jest.mock('hooks/logs/useCopyLogLink', () => ({
 	useCopyLogLink: jest.fn().mockReturnValue({
-		activeLogId: ACTIVE_LOG_ID,
+		activeLogId: undefined,
 	}),
 }));
 
diff --git a/frontend/src/container/TopNav/DateTimeSelectionV2/index.tsx b/frontend/src/container/TopNav/DateTimeSelectionV2/index.tsx
index c5a48b14022a..ef1ff875f87b 100644
--- a/frontend/src/container/TopNav/DateTimeSelectionV2/index.tsx
+++ b/frontend/src/container/TopNav/DateTimeSelectionV2/index.tsx
@@ -34,7 +34,7 @@ import { useCallback, useEffect, useState } from 'react';
 import { useQueryClient } from 'react-query';
 import { connect, useDispatch, useSelector } from 'react-redux';
 import { RouteComponentProps, withRouter } from 'react-router-dom';
-import { useNavigationType } from 'react-router-dom-v5-compat';
+import { useNavigationType, useSearchParams } from 'react-router-dom-v5-compat';
 import { useCopyToClipboard } from 'react-use';
 import { bindActionCreators, Dispatch } from 'redux';
 import { ThunkDispatch } from 'redux-thunk';
@@ -117,6 +117,8 @@ function DateTimeSelection({
 	);
 	const [modalEndTime, setModalEndTime] = useState<number>(initialModalEndTime);
 
+	const [searchParams] = useSearchParams();
+
 	// Effect to update modal time state when props change
 	useEffect(() => {
 		if (modalInitialStartTime !== undefined) {
@@ -410,8 +412,10 @@ function DateTimeSelection({
 			// Remove Hidden Filters from URL query parameters on time change
 			urlQuery.delete(QueryParams.activeLogId);
 
-			const updatedCompositeQuery = getUpdatedCompositeQuery();
-			urlQuery.set(QueryParams.compositeQuery, updatedCompositeQuery);
+			if (searchParams.has(QueryParams.compositeQuery)) {
+				const updatedCompositeQuery = getUpdatedCompositeQuery();
+				urlQuery.set(QueryParams.compositeQuery, updatedCompositeQuery);
+			}
 
 			const generatedUrl = `${location.pathname}?${urlQuery.toString()}`;
 			safeNavigate(generatedUrl);
@@ -428,6 +432,7 @@ function DateTimeSelection({
 			updateLocalStorageForRoutes,
 			updateTimeInterval,
 			urlQuery,
+			searchParams,
 		],
 	);
 
@@ -488,8 +493,10 @@ function DateTimeSelection({
 				urlQuery.set(QueryParams.endTime, endTime?.toDate().getTime().toString());
 				urlQuery.delete(QueryParams.relativeTime);
 
-				const updatedCompositeQuery = getUpdatedCompositeQuery();
-				urlQuery.set(QueryParams.compositeQuery, updatedCompositeQuery);
+				if (searchParams.has(QueryParams.compositeQuery)) {
+					const updatedCompositeQuery = getUpdatedCompositeQuery();
+					urlQuery.set(QueryParams.compositeQuery, updatedCompositeQuery);
+				}
 
 				const generatedUrl = `${location.pathname}?${urlQuery.toString()}`;
 				safeNavigate(generatedUrl);
diff --git a/frontend/src/utils/__tests__/queryContextUtils.test.ts b/frontend/src/utils/__tests__/queryContextUtils.test.ts
new file mode 100644
index 000000000000..81ddc8f2112d
--- /dev/null
+++ b/frontend/src/utils/__tests__/queryContextUtils.test.ts
@@ -0,0 +1,501 @@
+/* eslint-disable */
+
+import {
+	createContext,
+	extractQueryPairs,
+	getCurrentQueryPair,
+	getCurrentValueIndexAtCursor,
+} from '../queryContextUtils';
+
+describe('extractQueryPairs', () => {
+	beforeEach(() => {
+		jest.clearAllMocks();
+	});
+
+	test('should extract NOT EXISTS and NOT LIKE correctly', () => {
+		const input = "active NOT EXISTS AND name NOT LIKE '%tmp%'";
+
+		const result = extractQueryPairs(input);
+
+		expect(result).toEqual([
+			{
+				key: 'active',
+				operator: 'EXISTS',
+				value: undefined,
+				valueList: [],
+				valuesPosition: [],
+				hasNegation: true,
+				isMultiValue: false,
+				position: expect.any(Object),
+				isComplete: false,
+			},
+			{
+				key: 'name',
+				operator: 'LIKE',
+				value: "'%tmp%'",
+				valueList: [],
+				valuesPosition: [],
+				hasNegation: true,
+				isMultiValue: false,
+				position: expect.any(Object),
+				isComplete: true,
+			},
+		]);
+	});
+
+	test('should extract IN with numeric list inside parentheses', () => {
+		const input = 'id IN (1, 2, 3)';
+		const result = extractQueryPairs(input);
+		expect(result).toEqual([
+			expect.objectContaining({
+				key: 'id',
+				operator: 'IN',
+				isMultiValue: true,
+				isComplete: true,
+				value: expect.stringMatching(/^\(.*\)$/),
+				valueList: ['1', '2', '3'],
+				valuesPosition: expect.arrayContaining([
+					expect.objectContaining({
+						start: expect.any(Number),
+						end: expect.any(Number),
+					}),
+				]),
+			}),
+		]);
+	});
+
+	test('should handle extra whitespace and separators in IN lists', () => {
+		const input = "label IN [ 'a' ,  'b' ,  'c' ]";
+		const result = extractQueryPairs(input);
+		expect(result).toEqual([
+			expect.objectContaining({
+				key: 'label',
+				operator: 'IN',
+				isMultiValue: true,
+				isComplete: true,
+				value: expect.stringMatching(/^\[.*\]$/),
+				valueList: ["'a'", "'b'", "'c'"],
+			}),
+		]);
+	});
+
+	test('should return incomplete pair when value is missing', () => {
+		const input = 'a =';
+		const result = extractQueryPairs(input);
+		expect(result).toEqual([
+			expect.objectContaining({
+				key: 'a',
+				operator: '=',
+				value: undefined,
+				isComplete: false,
+			}),
+		]);
+	});
+
+	test('should parse pairs within grouping parentheses with conjunctions', () => {
+		const input = "(name = 'x' AND age > 10) OR active EXISTS";
+		const result = extractQueryPairs(input);
+		expect(result).toEqual([
+			expect.objectContaining({
+				key: 'name',
+				operator: '=',
+				value: "'x'",
+				isComplete: true,
+			}),
+			expect.objectContaining({
+				key: 'age',
+				operator: '>',
+				value: '10',
+				isComplete: true,
+			}),
+			expect.objectContaining({
+				key: 'active',
+				operator: 'EXISTS',
+				value: undefined,
+				isComplete: false,
+			}),
+		]);
+	});
+
+	test('should extract query pairs from complex query with IN operator and multiple conditions', () => {
+		const input =
+			"service.name IN ['adservice', 'consumer-svc-1'] AND cloud.account.id = 'signoz-staging' code.lineno < 172";
+
+		const result = extractQueryPairs(input);
+
+		expect(result).toEqual([
+			{
+				key: 'service.name',
+				operator: 'IN',
+				value: "['adservice', 'consumer-svc-1']",
+				valueList: ["'adservice'", "'consumer-svc-1'"],
+				valuesPosition: [
+					{
+						start: 17,
+						end: 27,
+					},
+					{
+						start: 30,
+						end: 45,
+					},
+				],
+				hasNegation: false,
+				isMultiValue: true,
+				position: {
+					keyStart: 0,
+					keyEnd: 11,
+					operatorStart: 13,
+					operatorEnd: 14,
+					valueStart: 16,
+					valueEnd: 46,
+					negationStart: 0,
+					negationEnd: 0,
+				},
+				isComplete: true,
+			},
+			{
+				key: 'cloud.account.id',
+				operator: '=',
+				value: "'signoz-staging'",
+				valueList: [],
+				valuesPosition: [],
+				hasNegation: false,
+				isMultiValue: false,
+				position: {
+					keyStart: 52,
+					keyEnd: 67,
+					operatorStart: 69,
+					operatorEnd: 69,
+					valueStart: 71,
+					valueEnd: 86,
+					negationStart: 0,
+					negationEnd: 0,
+				},
+				isComplete: true,
+			},
+			{
+				key: 'code.lineno',
+				operator: '<',
+				value: '172',
+				valueList: [],
+				valuesPosition: [],
+				hasNegation: false,
+				isMultiValue: false,
+				position: {
+					keyStart: 88,
+					keyEnd: 98,
+					operatorStart: 100,
+					operatorEnd: 100,
+					valueStart: 102,
+					valueEnd: 104,
+					negationStart: 0,
+					negationEnd: 0,
+				},
+				isComplete: true,
+			},
+		]);
+	});
+
+	test('should extract query pairs from complex query with IN operator without brackets', () => {
+		const input =
+			"service.name IN 'adservice' AND cloud.account.id = 'signoz-staging' code.lineno < 172";
+
+		const result = extractQueryPairs(input);
+		expect(result).toEqual([
+			{
+				key: 'service.name',
+				operator: 'IN',
+				value: "'adservice'",
+				valueList: ["'adservice'"],
+				valuesPosition: [
+					{
+						start: 16,
+						end: 26,
+					},
+				],
+				hasNegation: false,
+				isMultiValue: true,
+				position: {
+					keyStart: 0,
+					keyEnd: 11,
+					operatorStart: 13,
+					operatorEnd: 14,
+					valueStart: 16,
+					valueEnd: 26,
+					negationStart: 0,
+					negationEnd: 0,
+				},
+				isComplete: true,
+			},
+			{
+				key: 'cloud.account.id',
+				operator: '=',
+				value: "'signoz-staging'",
+				valueList: [],
+				valuesPosition: [],
+				hasNegation: false,
+				isMultiValue: false,
+				position: {
+					keyStart: 32,
+					keyEnd: 47,
+					operatorStart: 49,
+					operatorEnd: 49,
+					valueStart: 51,
+					valueEnd: 66,
+					negationStart: 0,
+					negationEnd: 0,
+				},
+				isComplete: true,
+			},
+			{
+				key: 'code.lineno',
+				operator: '<',
+				value: '172',
+				valueList: [],
+				valuesPosition: [],
+				hasNegation: false,
+				isMultiValue: false,
+				position: {
+					keyStart: 68,
+					keyEnd: 78,
+					operatorStart: 80,
+					operatorEnd: 80,
+					valueStart: 82,
+					valueEnd: 84,
+					negationStart: 0,
+					negationEnd: 0,
+				},
+				isComplete: true,
+			},
+		]);
+	});
+
+	test('should handle recursion guard', () => {
+		// This test verifies the recursion protection in the function
+		// We'll mock the function to simulate recursion
+
+		// Mock console.warn to capture the warning
+		const consoleSpy = jest.spyOn(console, 'warn').mockImplementation(() => {});
+
+		// Call the function multiple times to trigger recursion guard
+		// Note: This is a simplified test since we can't easily trigger the actual recursion
+		const result = extractQueryPairs('test');
+
+		// The function should still work normally
+		expect(Array.isArray(result)).toBe(true);
+
+		consoleSpy.mockRestore();
+	});
+});
+
+describe('createContext', () => {
+	test('should create a context object with all parameters', () => {
+		const mockToken = {
+			type: 29,
+			text: 'test',
+			start: 0,
+			stop: 3,
+		};
+
+		const result = createContext(
+			mockToken as any,
+			true, // isInKey
+			false, // isInNegation
+			false, // isInOperator
+			false, // isInValue
+			'testKey', // keyToken
+			'=', // operatorToken
+			'testValue', // valueToken
+			[], // queryPairs
+			null, // currentPair
+		);
+
+		expect(result).toEqual({
+			tokenType: 29,
+			text: 'test',
+			start: 0,
+			stop: 3,
+			currentToken: 'test',
+			isInKey: true,
+			isInNegation: false,
+			isInOperator: false,
+			isInValue: false,
+			isInFunction: false,
+			isInConjunction: false,
+			isInParenthesis: false,
+			keyToken: 'testKey',
+			operatorToken: '=',
+			valueToken: 'testValue',
+			queryPairs: [],
+			currentPair: null,
+		});
+	});
+
+	test('should create a context object with minimal parameters', () => {
+		const mockToken = {
+			type: 29,
+			text: 'test',
+			start: 0,
+			stop: 3,
+		};
+
+		const result = createContext(mockToken as any, false, false, false, false);
+
+		expect(result).toEqual({
+			tokenType: 29,
+			text: 'test',
+			start: 0,
+			stop: 3,
+			currentToken: 'test',
+			isInKey: false,
+			isInNegation: false,
+			isInOperator: false,
+			isInValue: false,
+			isInFunction: false,
+			isInConjunction: false,
+			isInParenthesis: false,
+			keyToken: undefined,
+			operatorToken: undefined,
+			valueToken: undefined,
+			queryPairs: [],
+			currentPair: undefined,
+		});
+	});
+});
+
+describe('getCurrentValueIndexAtCursor', () => {
+	test('should return correct value index when cursor is within a value range', () => {
+		const valuesPosition = [
+			{ start: 0, end: 10 },
+			{ start: 15, end: 25 },
+			{ start: 30, end: 40 },
+		];
+
+		const result = getCurrentValueIndexAtCursor(valuesPosition, 20);
+
+		expect(result).toBe(1);
+	});
+
+	test('should return null when cursor is not within any value range', () => {
+		const valuesPosition = [
+			{ start: 0, end: 10 },
+			{ start: 15, end: 25 },
+		];
+
+		const result = getCurrentValueIndexAtCursor(valuesPosition, 12);
+
+		expect(result).toBeNull();
+	});
+
+	test('should return correct index when cursor is at the boundary', () => {
+		const valuesPosition = [
+			{ start: 0, end: 10 },
+			{ start: 15, end: 25 },
+		];
+
+		const result = getCurrentValueIndexAtCursor(valuesPosition, 10);
+
+		expect(result).toBe(0);
+	});
+
+	test('should return null for empty valuesPosition array', () => {
+		const result = getCurrentValueIndexAtCursor([], 5);
+
+		expect(result).toBeNull();
+	});
+});
+
+describe('getCurrentQueryPair', () => {
+	test('should return the correct query pair at cursor position', () => {
+		const queryPairs = [
+			{
+				key: 'a',
+				operator: '=',
+				value: '1',
+				position: {
+					keyStart: 0,
+					keyEnd: 0,
+					operatorStart: 2,
+					operatorEnd: 2,
+					valueStart: 4,
+					valueEnd: 4,
+				},
+				isComplete: true,
+			} as any,
+			{
+				key: 'b',
+				operator: '=',
+				value: '2',
+				position: {
+					keyStart: 10,
+					keyEnd: 10,
+					operatorStart: 12,
+					operatorEnd: 12,
+					valueStart: 14,
+					valueEnd: 14,
+				},
+				isComplete: true,
+			} as any,
+		];
+
+		const query = 'a = 1 AND b = 2';
+		const result = getCurrentQueryPair(queryPairs, query, 15);
+
+		expect(result).toEqual(queryPairs[1]);
+	});
+
+	test('should return null when no pairs match cursor position', () => {
+		const queryPairs = [
+			{
+				key: 'a',
+				operator: '=',
+				value: '1',
+				position: {
+					keyStart: 0,
+					keyEnd: 0,
+					operatorStart: 2,
+					operatorEnd: 2,
+					valueStart: 4,
+					valueEnd: 4,
+				},
+				isComplete: true,
+			} as any,
+		];
+
+		const query = 'a = 1';
+		// Test with cursor position that's before any pair starts
+		const result = getCurrentQueryPair(queryPairs, query, -1);
+
+		expect(result).toBeNull();
+	});
+
+	test('should return null for empty queryPairs array', () => {
+		const result = getCurrentQueryPair([], 'test query', 5);
+
+		expect(result).toBeNull();
+	});
+
+	test('should return last pair when cursor is at the end', () => {
+		const queryPairs = [
+			{
+				key: 'a',
+				operator: '=',
+				value: '1',
+				position: {
+					keyStart: 0,
+					keyEnd: 0,
+					operatorStart: 2,
+					operatorEnd: 2,
+					valueStart: 4,
+					valueEnd: 4,
+				},
+				isComplete: true,
+			} as any,
+		];
+
+		const query = 'a = 1';
+		const result = getCurrentQueryPair(queryPairs, query, 5);
+
+		expect(result).toEqual(queryPairs[0]);
+	});
+});
diff --git a/frontend/src/utils/queryContextUtils.ts b/frontend/src/utils/queryContextUtils.ts
index 330a083f2cc5..afc2fa400b55 100644
--- a/frontend/src/utils/queryContextUtils.ts
+++ b/frontend/src/utils/queryContextUtils.ts
@@ -1255,10 +1255,12 @@ export function extractQueryPairs(query: string): IQueryPair[] {
 							allTokens[iterator].type,
 						)
 					) {
+						// Capture opening token type before advancing
+						const openingTokenType = allTokens[iterator].type;
 						multiValueStart = allTokens[iterator].start;
 						iterator += 1;
 						const closingToken =
-							allTokens[iterator].type === FilterQueryLexer.LPAREN
+							openingTokenType === FilterQueryLexer.LPAREN
 								? FilterQueryLexer.RPAREN
 								: FilterQueryLexer.RBRACK;
 
@@ -1279,6 +1281,15 @@ export function extractQueryPairs(query: string): IQueryPair[] {
 						if (allTokens[iterator].type === closingToken) {
 							multiValueEnd = allTokens[iterator].stop;
 						}
+					} else if (isValueToken(allTokens[iterator].type)) {
+						valueList.push(allTokens[iterator].text);
+						valuesPosition.push({
+							start: allTokens[iterator].start,
+							end: allTokens[iterator].stop,
+						});
+						multiValueStart = allTokens[iterator].start;
+						multiValueEnd = allTokens[iterator].stop;
+						iterator += 1;
 					}
 
 					currentPair.valuesPosition = valuesPosition;
diff --git a/frontend/tsconfig.jest.json b/frontend/tsconfig.jest.json
new file mode 100644
index 000000000000..f2dc6787e1a6
--- /dev/null
+++ b/frontend/tsconfig.jest.json
@@ -0,0 +1,7 @@
+{
+	"extends": "./tsconfig.json",
+	"compilerOptions": {
+		"target": "es6",
+		"noEmit": false
+	}
+}
\ No newline at end of file