This happens to my mate all the time. Me and my mates reluctantly invite him sometimes. Not because we dont like him, he's sound lol just that his connection is TERRIBLE. The game makes him the host about 80% of the time and he gives us all 1 or 2 bars. Even with the 1 bar, he still doesnt get kicked out the game. Its a pain in the a'rse!

Specially when we dont want to be mean and say "We ain't inviting you cos of your connection!" he just joins session and gets the host when a new match is starting.

AWAY with Join Session!