[loop] Pass the data loaders for proper output creation

beat/backend/python/execution/loop.py

@@ -214,6 +214,7 @@ class LoopExecutor(object):
             self.prefix,
             cache_root,
             input_list=self.input_list,
+            data_loaders=self.data_loaders,
         )
 
         self.message_handler = message_handler