diff --git a/backend/services/scheduler/core/scheduler.py b/backend/services/scheduler/core/scheduler.py
index a230df50..736953af 100644
--- a/backend/services/scheduler/core/scheduler.py
+++ b/backend/services/scheduler/core/scheduler.py
@@ -700,14 +700,7 @@ class TaskScheduler:
             return summary
 
         try:
-            # Pass user_id for strict user isolation where loaders support it.
-            # Keep backward compatibility with legacy loaders that only accept db.
-            import inspect
-            loader_signature = inspect.signature(task_loader)
-            if "user_id" in loader_signature.parameters:
-                tasks = task_loader(db, user_id=user_id)
-            else:
-                tasks = task_loader(db)
+            tasks = task_loader(db)
 
             if not tasks:
                 return summary