diff --git a/src/langbot/pkg/provider/runners/difysvapi.py b/src/langbot/pkg/provider/runners/difysvapi.py
index 17203bdd..3e89500a 100644
--- a/src/langbot/pkg/provider/runners/difysvapi.py
+++ b/src/langbot/pkg/provider/runners/difysvapi.py
@@ -529,7 +529,7 @@ class DifyServiceAPIRunner(runner.RequestRunner):
                         think_end = True
                     elif think_end or not think_start:
                         pending_agent_message += chunk['answer']
-                    if think_start:
+                    if think_start and not think_end:
                         continue
 
                 else: