Q:
Mobs disappearing into the walls while trying to attack...
I had this happen to me on multiple occasions, i think its more of a mapping / pathing bug then anything else. I found that my pet could still attack them so send him in to kill them. kinda annoying as i managed to solo a champion mob that had loot but was glitched into the wall so couldnt be looted. maybe i lost something nice from it (-.-)