Xmpp group/muc invites showing up as broadcasts (no invite request either)

I am having trouble with an issue where I send a group invite request from another client (both from spark and pidgin) and the receiving client only displays a broadcast from the chat session. The issue appears to be different in the two client versions I have tested, 2.5.5, and 2.5.7.

(note chat room is created, and unlocked)

Spark 2.5.5

broadcast from room with the invite request text.

invite button/msg from the sender, clicking allow doesn’t work, as the broadcast window is open. if one closes the broadcast window, and then clicks accept, one joins the channel as ‘normal’.

Spark 2.5.7

broadcast from room with the invite request text.

no invite recieved.

Watching the packets it would appear that the protocol is being followed however, I cannot figure out why this is happening. I’m looking for any help that can aid me in figuring out why this is happening.