[Couch Coop] Constant Connection Loss on Teleporting

Whenever we do open a portal to get back to town or do use said portal back to the place it was opened in, with a 99% certainty we do get an error throwing us back into the login screen.
Only porting with one character does work fine.

Oh, and just to pester you guys a little bit more with it: Having a second account in couch coop being able to login to play would be lovely ;)

We have the same error. This completely spoils the fun of the loot and the game.