Issue sharing boards and assigning tasks#1434

We just started our premiums team subscription and aren’t able to share boards or assign tasks anymore.
Team members can see the boards but only tasks they themselves put into the board and also can not assign tasks to other members, that had access to the shared boards before. We have tried everything we yould find as a possible solution (logging off and on, adding random tasks to trigger synching, creating new shared boards etc…) but unfortunately the bug still exists which is a huge problem for our work.