When a user is declining an invitation request by sending a decline message, a server is forwarding this decline to the person who sent the invitation. This message
<message from="room2@conference.xmpp.test" to="test1@xmpp.test">
<x xmlns="http://jabber.org/protocol/muc#user">
<decline from="anno@xmpp.test"/>
</x>
</message>
Is picked up by the invitationRejectionListener but this listener is not properly filtering on room-jid, so all rooms will receive this invitation Rejection.