Update app.py

app.py

@@ -689,6 +689,9 @@ with gr.Blocks() as app:
             global step_index
             if_end = False
             step_index += 1
+            if (step_index=len(process_steps)):
+                step_index  = 0
+                msg = ""
             msg = history
             if step_index < len(process_steps):
                 msg += previous_response + "\nUser feedback:" + user_feedback +"\n\n"