Mobs seem to teleport up stairs after being hit and possibly down stairs now.
Most importantly, there's a
Barbed Bone Skeleton frequently on the main floor, which is level 26 and too much for normal main floor groups. Not sure if that is normal or the result of a glitch, but some people I was playing with today thought it was because of pathing errors in Unrest after the Velious update.
If it's an error, would be great to have the Barbed Bone stay in its proper place.