keep url as it is

app.py

@@ -14,12 +14,11 @@ if "messages" not in st.session_state:
 if "uploader_key" not in st.session_state:
     st.session_state["uploader_key"] = 0
 
-if "id" in st.query_params:
+if len(st.session_state.messages) == 0 and "id" in st.query_params:
     with st.spinner("Loading chat..."):
         id = st.query_params["id"]
         data = get_file(id, 'chatgpt-vision-007')
         st.session_state.messages = pickle.loads(data)
-        st.query_params.clear()
 
 def clear_uploader():
     st.session_state["uploader_key"] += 1