Loading in or out of any vessel of hatred areas causes the game to crash; as will high density mob screens in these areas. Additionally, loading in or out of the boss lairs (Urivar/Harbinger) in these areas causes game crash and/or black screen and/or infinite loading screen. The Under city is completely unplayable. I have not made one full run this whole season without it crashing or freezing.
**This continues after 2.2.1 patch