Getting message acknowledgment for deleted chat room

Hi guys,

I want to get message’s acknowledgment of chat room. For that i am using (XEP-0198) on client side.

I successfully got acknowledgment for message on chat room. but it also sending me acknowledgment of deleted chat room.

I have register listener for acknowledgment using connection.streamManagement.addAcknowledgedStanzaListener(this.onMessageAck);

Can you tell me, what is the issue ?