diff --git a/lightrag/kg/shared_storage.py b/lightrag/kg/shared_storage.py
index 8b41591c..834cdc8f 100644
--- a/lightrag/kg/shared_storage.py
+++ b/lightrag/kg/shared_storage.py
@@ -1371,11 +1371,20 @@ async def get_all_update_flags_status(workspace: str | None = None) -> Dict[str,
     result = {}
     async with get_internal_lock():
         for namespace, flags in _update_flags.items():
-            namespace_split = namespace.split(":")
-            if workspace and not namespace_split[0] == workspace:
-                continue
-            if not workspace and namespace_split[0]:
-                continue
+            # Check if namespace has a workspace prefix (contains ':')
+            if ":" in namespace:
+                # Namespace has workspace prefix like "space1:pipeline_status"
+                # Only include if workspace matches the prefix
+                # Use rsplit to split from the right since workspace can contain colons
+                namespace_split = namespace.rsplit(":", 1)
+                if not workspace or namespace_split[0] != workspace:
+                    continue
+            else:
+                # Namespace has no workspace prefix like "pipeline_status"
+                # Only include if we're querying the default (empty) workspace
+                if workspace:
+                    continue
+
             worker_statuses = []
             for flag in flags:
                 if _is_multiprocess:
@@ -1439,7 +1448,10 @@ async def get_namespace_data(
     async with get_internal_lock():
         if final_namespace not in _shared_dicts:
             # Special handling for pipeline_status namespace
-            if final_namespace.endswith(":pipeline_status") and not first_init:
+            if (
+                final_namespace.endswith(":pipeline_status")
+                or final_namespace == "pipeline_status"
+            ) and not first_init:
                 # Check if pipeline_status should have been initialized but wasn't
                 # This helps users to call initialize_pipeline_status() before get_namespace_data()
                 raise PipelineNotInitializedError(final_namespace)
@@ -1572,7 +1584,8 @@ def finalize_share_data():
         _init_flags, \
         _initialized, \
         _update_flags, \
-        _async_locks
+        _async_locks, \
+        _default_workspace
 
     # Check if already initialized
     if not _initialized:
@@ -1635,6 +1648,7 @@ def finalize_share_data():
     _data_init_lock = None
     _update_flags = None
     _async_locks = None
+    _default_workspace = None
 
     direct_log(f"Process {os.getpid()} storage data finalization complete")