Stuck in the Tur Dulra quest/battle

I’m doing the fight with Infernal Tormenter in the Tur Dulra stronghold mission, but after getting him down to nearly dead he disappeared and nothing is happening. It still says “Slay the Infernal Tormentor” as the active quest, but there are no enemies. The exits are all sealed off.

I can’t progress and I can’t leave the arena.

I just encountered this bug as well, so it’s still existing. Same class, Druid, and I noticed one of my wolves was on the other side of the fog wall that traps me inside. I’m wondering if the boss tried to attack this wolf, and that’s what caused him to disappear? Regardless, this is a bit annoying.

The bug is still in. Yeah, if the boss would spawn in a location outside of the arena because of you or an NPC companion, he’ll just stop fighting.

Still happening. Annoying.