| dunno if this is 100% confirmed but worked for my guild tonight
apparently after killing each wave of mobs + named, it does an NPC check. if there are no npcs left it spawns next wave. apparently horses and pets are being counted as npcs and only when we killed all pets and dismounted from horses, waves would spawn.
it seemed to work BUT it may just be coincidence that mobs spawned as we killed pets
-Serrath |