I was fighting an Ashen Minotaur and an Ashen Oracle, and the Oracle cast a healing spell just as I was killing the Minotaur... The minotaur showed full health and kept repeating the attack animation, and continued to follow me around, but he wasn't hitting me and I couldn't hit him. Would be kind of amusing, except the game still sees him as a hostile enemy, and therefore wouldn't allow me to use my recoveries, saying I can't do so with enemies nearby.