diff --git a/roboco/services/git.py b/roboco/services/git.py
index b583cde5..f40ad7c4 100644
--- a/roboco/services/git.py
+++ b/roboco/services/git.py
@@ -3363,7 +3363,16 @@ class GitService(BaseService):
         workspace = await self._workspace_for_branch(
             branch_name, actor_agent_id=actor_agent_id
         )
-        return await self.push(workspace)
+        # Push the NAMED branch, not the workspace's current checkout. The
+        # clone root is shared across a dev's tasks and (F123) parked on the
+        # default branch while the task branch lives in a per-task worktree;
+        # push() with branch=None defaults to get_current_branch(workspace),
+        # which pushed the wrong ref. The dev's commit then never reached
+        # origin, so create_pr 422'd with "No commits between" and the dev was
+        # forced into i_am_blocked — stranded work the PM's unblock can't fix
+        # (it only flips status, not git state). Push-by-name also survives a
+        # clone parked on a LATER task's branch.
+        return await self.push(workspace, branch=branch_name)
 
     async def _ensure_base_on_remote(
         self,
diff --git a/tests/unit/services/test_git.py b/tests/unit/services/test_git.py
index 5e8fda9d..34e0b11a 100644
--- a/tests/unit/services/test_git.py
+++ b/tests/unit/services/test_git.py
@@ -160,6 +160,35 @@ async def test_push_task_branch_pushes_task_branch_by_name() -> None:
     assert_branch.assert_not_awaited()
 
 
+@pytest.mark.asyncio
+async def test_push_branch_pushes_named_branch_not_current_checkout() -> None:
+    """push_branch (open_pr's push side effect) pushes the NAMED branch.
+
+    The clone root is shared across a dev's tasks and (F123) parked on the
+    default branch while the task branch lives in a per-task worktree.
+    push_branch used to call push(workspace) with no ``branch`` arg, so
+    push() fell back to get_current_branch(workspace) and pushed the wrong
+    ref (the clone root's checkout, e.g. the default branch). The dev's
+    commit then never reached origin, create_pr 422'd with "No commits
+    between", and the dev was forced into i_am_blocked — stranded work the
+    PM's unblock cannot repair (it flips status, not git state). The named
+    branch must be passed through to push().
+    """
+    branch_name = "feature/backend/fb836f80--03f80432--d3dab0fc--b04afcb5"
+    svc = _service()
+    _bind(svc, "_workspace_for_branch", AsyncMock(return_value=Path("/tmp/ws")))
+    push_mock = AsyncMock(return_value=(branch_name, _PUSHED_COMMIT_COUNT))
+    _bind(svc, "push", push_mock)
+
+    result_branch, pushed = await svc.push_branch(branch_name)
+
+    assert result_branch == branch_name
+    assert pushed == _PUSHED_COMMIT_COUNT
+    # The named branch is forwarded to push() — NOT push(workspace) which
+    # would default to the clone root's current checkout.
+    push_mock.assert_awaited_once_with(Path("/tmp/ws"), branch=branch_name)
+
+
 @pytest.mark.asyncio
 async def test_push_targets_explicit_branch_not_current_checkout() -> None:
     """push(branch=X) pushes X by ref even when the workspace is on Y."""