Hi,
Playing multiplayer, 2 people lone wolf.
Act 2, west side, near the bridge with the troll. When opening the chest, a Void Touched Beastmaster and his two pets with Guardian Angel appear (Pasha and Tasha).
Doing damage to either pet, the game crashes. It looks like their Guardian Angel buff is linked to something under the map.
Tried multiple methods, and this has happened on two separate playthroughs (did a second playthrough due to save game bug, thanks for fixing that guys).