diff --git a/backend/open_webui/utils/middleware.py b/backend/open_webui/utils/middleware.py
index a13f43193d..a58b84c714 100644
--- a/backend/open_webui/utils/middleware.py
+++ b/backend/open_webui/utils/middleware.py
@@ -663,7 +663,9 @@ def handle_responses_streaming_event(
                             current_val = {} if isinstance(delta, dict) else ''
                         item[key] = deep_merge(current_val, delta)
 
-            return new_output, None
+                return new_output, None
+
+        return current_output, None
 
     elif event_type.startswith('response.') and event_type.endswith('.done'):
         # Delta Events: response.content_part.done, response.text.done, etc.