In multiplayer every couple of levels the caves glitch and freeze. The monsters don't move and can't collect any items. I have lost out on a number of prismatic shards and lots of other items.
Ps4. Same issue playing local split screen. It freezes the monsters in place. Leaves swipe trails of weapons. Monsters can be killed but not by the player that starts the fight, and often no one can collect loot on the level.
Idk if it's related, but on levels where it things work, it seems processing speeds up and drops are sucked in super fast.