So, no reason to play the game right now, I guess.
Everybody’s overflow stash has disappeared and any new items that go into overflow disappear when the game is restarted. No word from Kabam on whether this is a permanent loss or something that can be restored, or whether it is safe to add items to overflow while the bug persists. So, there is no reason to play the game just to have items earned go into overflow and disappear.
Shutting it down until this problem is fixed.