Chatbot human in the loop issue.

So I had created rag bot integrated with meta messaging api. And did some market research and found there must be a mechanism where when admin replies to customer then the response from the llm is to be blocked in order to prevent double talk (.I.e: llm, admin) .

I tried to get event message_handover , message_postback from meta in order to trigger my stopping mechanism but for some reason despite showing my page is subscribed to the events ,it is not getting event signal of message_postback when admin takes over.

If you had similar issue help me with some suggestion.