diff --git a/desktop/src-tauri/src/managed_agents/restore.rs b/desktop/src-tauri/src/managed_agents/restore.rs
index 3b093e444..9a99ff803 100644
--- a/desktop/src-tauri/src/managed_agents/restore.rs
+++ b/desktop/src-tauri/src/managed_agents/restore.rs
@@ -129,7 +129,11 @@ pub async fn restore_managed_agents_on_launch(
                         (canonical == receipt.key
                             && receipt.desktop_instance_id == super::current_instance_id(app)
                             && super::process_is_running(receipt.pid)
-                            && super::process_belongs_to_us(receipt.pid))
+                            && super::process_belongs_to_us(receipt.pid)
+                            && super::process_has_buzz_marker(
+                                receipt.pid,
+                                &receipt.desktop_instance_id,
+                            ))
                         .then_some(receipt.pid)
                     }),
             )
diff --git a/desktop/src-tauri/src/managed_agents/runtime.rs b/desktop/src-tauri/src/managed_agents/runtime.rs
index 832fe0041..0c9ab95b6 100644
--- a/desktop/src-tauri/src/managed_agents/runtime.rs
+++ b/desktop/src-tauri/src/managed_agents/runtime.rs
@@ -169,7 +169,7 @@ fn buzz_marker_entry(instance_id: &str) -> Vec<u8> {
 /// is this desktop instance's id. A process stamped with a *different* instance
 /// id belongs to another live Buzz app and must never be reaped here.
 #[cfg(target_os = "macos")]
-fn process_has_buzz_marker(pid: u32, instance_id: &str) -> bool {
+pub(crate) fn process_has_buzz_marker(pid: u32, instance_id: &str) -> bool {
     let marker = buzz_marker_entry(instance_id);
     let Some(buf) = sweep::procargs2_buffer(pid) else {
         return false;
@@ -213,7 +213,7 @@ fn process_has_buzz_marker(pid: u32, instance_id: &str) -> bool {
 }
 
 #[cfg(all(unix, not(target_os = "macos")))]
-fn process_has_buzz_marker(pid: u32, instance_id: &str) -> bool {
+pub(crate) fn process_has_buzz_marker(pid: u32, instance_id: &str) -> bool {
     let marker = buzz_marker_entry(instance_id);
     let Ok(data) = std::fs::read(format!("/proc/{pid}/environ")) else {
         return false;
@@ -222,7 +222,7 @@ fn process_has_buzz_marker(pid: u32, instance_id: &str) -> bool {
 }
 
 #[cfg(not(unix))]
-fn process_has_buzz_marker(_pid: u32, _instance_id: &str) -> bool {
+pub(crate) fn process_has_buzz_marker(_pid: u32, _instance_id: &str) -> bool {
     false
 }