During the quest, there is an option to click on the traps and lanterns to stop the traps and summon the minibosses there. Once the lantern is selected and burning, it does nothing, so the required enemies do not spawn, therefore the quest in unable to be completed.
Attempted on Noranii-Darkspear 7:30pm CST 11.25.2020
im having the same issue
Attempted on Deathnox-Kiljaeden 703pm pst
No addons, with addons, dropped/picked back up, did one disarm, three disarms, etc. The cats on the left look like they activate, but they just turned black in color and nothing happened. If you leave the cave and come back in after a few minutes wait, the burner will become active again. However, it still doesn’t trigger the event. Super frustrating as I’m only a couple quests away from having everything finished in Bastion.