As title said, sometimes Thing in the ice fly in the air, but never come back down, so we have to let ourselves be killed to reset it.
That’s very amateur for a game with such high prices.
Do better at least if you want to be greedy.
I’ve had this happen to me too on my Sorcerer. My Necro and Barb didn’t have this happen. It did it to me on other bosses too. Andy would go away on one phase, I killed the 3 mobs to summon her back, but she didn’t return.
I even just ran a Pit today with a bug that doesn’t happen with my other classes. I get to 100% and no red portal. I go through killing several packs of elite mobs while at 100% completion, but still no portal. Killed all mobs on both floors until they were empty.