Game Mechanics: NPC pet memory & feign death

[Shoneys]

I've noticed that, since the last patch, mobs with pets do not wipe agro on a FD player once they have reset to their spawn. I've witnessed this particularly with spite golems and forsaken revenants in the plane of hate. Spamming multiple multiple FD sometimes will blur both the pet and the owner, but waiting for the mob to return to its spawn will never keep the mob from coming for you, unlike any other non pet class mob in the zone. I'm assuming this is server wide and not particular to hate.