Can't quit a party?

I received an invite for a trade, got the item I bought and tried to leave the party. This happened:




The worst part? Even quitting the game does not fix it BUT it changes the character who is in the party with me (all offline tho).



Which is a funny thing, since I already got the bug of the unkillable Purifier today.

Seen the same issue. I think I had someone in global invite me to a party and that cleared it up.