I’m playing lately in hell with two different characters, warlock and assassin, and sometimes the mobs don’t die. They keep attacking while their health is basically at zero, and none of my attacks affect it, and my pets and hire don’t see it or target it. Even though it attacks whoever is closest. Sometimes I am able to go back to town and when I get back in the area the enemies with one life finally drop. But it doesn’t always work, and in the arcane sanctuary it seems to be a bit worse.
Edit: Especially Goat Men it seems like