Runaway Evolution Underkeep bug

Since the reset on Tuesday, the abominations in Runaway Evolution (Underkeep) are one-shotting my 707 mage by running over her–without her previously being seriously damaged by mobs! Previously to this there was barely any damage from this on my characters. Is this a bug? Or did someone just decide to mess with us and not say anything, making it “more fun and challenging” /sarcasm?