Stuck out of bound during couch co-op

Hey,

When I play couch co-op with 2 of my characters (TasteMyBallz & WitchBeachSlaanesh), they both always spawn out of bound in the Ziggurat Encampment preventing me from moving, attacking or doing anything else. Also if I open the quest screen the map is empty, I can't teleport out.

I'm totally stuck and can't play couch-coop anymore :(

Here are some screenshot:




What can I do?
Thanks for your help.