There appears to be a threading deadlock issue on the PS4 version of the game.

The game will randomly hang indefinitely while playing local 2-player coop on my PS4 pro. The issue only seems to affect the game/main/rendering threads - we've heard boss fight music continue to play in some instances.

It has happened on several maps, with varous armor, abilities, and mobs. The only common thing seems to be that it happens during large fights when the game is already dropping frames. We suspect that maybe it's related to Torment arrows, but that could just be a coincidence.