On the admin console, kicking a user from a MUC room is not sent out to the other clients in the room, it appears.
This is not just in admin console, but about kick action.
When multi session user join same room with same nick, previous user is kicked.
But this is not broadcasted in room.
Patch under review (courtesy Peter Johnson).
Applied patch and performed light testing with Spark and Pidgin. Presumed fixed.