coop community chambers issue

[Pufferton]

I can play single player and regular coop no problem but when i try to play the community chambers with my friend it immediatly sends me to the main menu once he accepts my invite. same if he invites me. tried restarting router, modem, computer, and game.

any help?

[| \_/ ()]

it's the map. i had the same bug , there was just a problem with the chamber, because when I and a friend tried another map everything was ok . or at least I think so.

[Pufferton]

its not just the map...i am using the quick play option and trying every option.