One of my creatures in a fight against The Ancestor died, but kept attacking throughout the fight.
I don’t have any perks/anointments that should allow it to do this.
It may be an interaction with Fleshripper in some way. I noticed he was always attacking after Fleshripper did something (which he had attuned).
Due to blood mage perks, he was also attacking multiple times when it happened, I’m assuming because he was at 0% health and blood mages attack/cast more depending on missing health.