diff --git a/src/backend/api/router.py b/src/backend/api/router.py
index 886eaf4f1..6af07485a 100644
--- a/src/backend/api/router.py
+++ b/src/backend/api/router.py
@@ -341,19 +341,31 @@ async def process_request(
 
     # Ensure the workflow is valid (rebuild if terminated or stuck from a prior run)
     current_workflow = orchestration_config.get_current_orchestration(user_id)
+
+    cached_team_id = getattr(current_workflow, "_team_id", None)
+    team_mismatch = (
+        current_workflow is not None and cached_team_id != team_id
+    )
+
     workflow_unusable = (
         current_workflow is None
         or getattr(current_workflow, "_terminated", False)
         or getattr(current_workflow, "_is_running", False)
+        or team_mismatch
     )
     if workflow_unusable:
         logger.info(
-            "Workflow unusable for user '%s' (None=%s, terminated=%s, is_running=%s) — rebuilding",
+            "Workflow unusable for user '%s' (None=%s, terminated=%s, is_running=%s, "
+            "team_mismatch=%s cached_team=%s selected_team=%s) — rebuilding",
             user_id,
             current_workflow is None,
             getattr(current_workflow, "_terminated", False),
             getattr(current_workflow, "_is_running", False),
+            team_mismatch,
+            cached_team_id,
+            team_id,
         )
+
         # Force-clear the running flag so get_current_or_new_orchestration
         # sees it as terminated and takes the lightweight reset path.
         if current_workflow is not None and getattr(current_workflow, "_is_running", False):
@@ -1454,4 +1466,4 @@ async def get_generated_image(blob_name: str):
         return Response(content=data, media_type="image/png")
     except Exception as exc:
         logging.error(f"Error retrieving image '{blob_name}': {exc}")
-        raise HTTPException(status_code=404, detail="Image not found")
+        raise HTTPException(status_code=404, detail="Image not found")
\ No newline at end of file
diff --git a/src/backend/orchestration/orchestration_manager.py b/src/backend/orchestration/orchestration_manager.py
index 3c352a3e3..1eddd40d9 100644
--- a/src/backend/orchestration/orchestration_manager.py
+++ b/src/backend/orchestration/orchestration_manager.py
@@ -202,10 +202,35 @@ async def get_current_or_new_orchestration(
         current = orchestration_config.get_current_orchestration(user_id)
         workflow_terminated = getattr(current, "_terminated", False)
 
-        # Full rebuild: no workflow exists or team explicitly changed
-        needs_full_rebuild = current is None or team_switched
+        # Detect a stale cached orchestration: it was built for a different team
+        # than the one now selected. Without this, /select_team leaves the prior
+        # team's workflow cached and the next run executes the wrong agents until
+        # a page refresh rebuilds it. The team_id tag is set on every workflow we
+        # build/reset below.
+        current_team_id = getattr(current, "_team_id", None)
+        team_changed = (
+            current is not None and current_team_id != team_config.team_id
+        )
+
+
+        cls.logger.info(
+            "get_current_or_new_orchestration: user='%s' selected_team='%s' "
+            "cached_team='%s' team_switched=%s team_changed=%s current_is_none=%s",
+            user_id, team_config.team_id, current_team_id,
+            team_switched, team_changed, current is None,
+        )
+
+
+        # Full rebuild: no workflow exists, team explicitly switched, or the
+        # cached workflow belongs to a different team than the selected one.
+        needs_full_rebuild = current is None or team_switched or team_changed
+
+
+        # Lightweight reset: workflow finished but agents are still valid for the
+        # same team (a team change always routes to full rebuild above so we
+        # never reuse the previous team's agents here).
+
 
-        # Lightweight reset: workflow finished but agents are still valid
         needs_workflow_reset = not needs_full_rebuild and workflow_terminated
 
         if needs_full_rebuild:
@@ -808,4 +833,4 @@ async def _process_event_stream(
             if tool_approvals:
                 result["tool_approvals"] = tool_approvals
             return result
-        return None
+        return None
\ No newline at end of file