To return to the original topic, enemies definitely heal outside of combat now. I recently tried to weaponise Gale's necrotic death aura against the tomb raiders in the ruined temple of Jergal (by smashing in the roof to gather them all in the corridor and then letting Gale go down there and die in the middle of them) and to my disappointment, as soon as Gale was dead, combat was over, and his aura started damaging them... They started healing themselves up. And kept healing themselves. Unendingly.
There's a chance the bulette has similar ability to just heal itself right back up to full health outside of combat.
