So I decided to play Helltooth Zombie Charger.
And the very first Rift was Act3 Bastion Keep map.
The Zombie bears all start from the back of the WD and if I was at the very door, the bears were easily blocked by door frame. I have to reposition myself at the very center of the room or else the bears wont get to damage the enemies.
Jeez… This mechanic suck very bad!