Crashes, freezes, the floor is missing… the list goes on.
Apparently this is also an issue on other platforms but I’m not going to test this on my PC.
First off start Act IV. Seems fine. Iskatu and his hordes spawn and get murdered, no problems.
Except once Iskatu dies and the demonic barrier vanishes there is no floor beyond it. If you attempt to run across the line demarcating between floor and not floor (DON’T) you’ll be stuck running in place until you exit the game instance. Total restart is not necessary. The game isn’t frozen, just your character.
Alternatively if you town portal and teleport back the floor will now load.
Run across the freshly rendered floor to the Gardens of Hope First Teir, the checkpoint, the waypoint, and that angel dude who is all whiny about fate.
IMPORTANT INFO IF YOU’RE STUCK
Don’t try to run across the bugged floor! Teleport to town, go back through your portal, DO NOT TAKE THE WAYPOINT. Every time I took the waypoint and progressed past without physically running across the previous checkpoint I would crash upon encountering the first demon fighting angels in the Garden of Hope First Tier.
If you did this, just restart the act. Saved me, maybe it’ll save you.
Added note: If you begin The Fall of the High Heavens and too quickly town portal… Bastion’s Keep will have no floor and you’ll be unable to do anything other than leave the game and re-enter.
Waiting the amount of time it took to write this before portaling seems to have been sufficient to resolve it.