Bugged waystone maps

I've ran into a few problems since the patch, I've had like 3 maps in about 3 hours of maps that were unable to be finished due to a bug. The mammoth and necromancer boss on waystones, sometimes the necromancer won't spawn and you can't complete map. I've also had a few maps where the rare monsters have spawned outside of map range and can no longer complete map. I also had one where after I finished the boss I could no longer exit the room and had to menu out. All on waystone maps

Hyena boss also will freeze and stand still and do no animations but will still do damage to you