Unrest pathing
 

Pulling mobs on 2nd floor of unrest (Fireplace) mobs warping through walls and floors

Some drop through the floor to MR potentially agro and slaughter a group down there and then run up the stairs back to fire place potentially bringing a bunch of friendo's with them

+1

This was true pre-patch yesterday too. Fairly easy to repro by pulling down to FP from tower. They'll often disappear on their way to FP and then come running *up* the stairs from MR a minute later.