Game breaking Co Op bug?

So my friend and I are in Act Two Part 1 at the village, and when picking up an upgrade for Jack I’m forced into the Jack screen(I am not the session leader but the co-op partner) My friend can upgrade Jack with the new part, leave the screen and keep playing. But I can’t. I’m stuck at the Jack screen, unable to back out or do anything or interact with Jack in seemingly any way but respecing him.

Is anyone familiar with this? I would usually ignore the odd bug or two, comes with the territory. But this is a game breaking bug. We literally can’t go any further right now. We tried to reload once and had the same issue.