Update app.py

app.py

@@ -92,6 +92,7 @@ def image_qa_app(kbvqa):
             st.session_state['answer_in_progress'] = True
             answer = answer_question(st.session_state['processed_image'], question, model=kbvqa)
             st.session_state['qa_history'].append((question, answer))
+            st.session_state['question'] = ''
 
     # Display all Q&A
     for q, a in st.session_state['qa_history']: