Dungeons - Aspect of Evolution Node bugged.
So just faced a Dorm in Room 7 dungeon. He had Rage + this node. It's the one which switches your health bars for 5 seconds after 10 seconds.
The first switch happened when he was at 93% health and I had 100%. After that, I died when he was at 75%. Next fight he was at around 58% when the switch happened, but when it was supposed to revert him to 58%, it gave him 93% instead. This same thing kept on happening and I lost all my champs to this stupid bug.