Its his server we are playing on. But I don't think he revived me. It was surprising to both of us. Also it sounds dumb but he wanted me to fight my zombie me so he had no reason to fully heal me.
As you can see in the clip I was terminally damaged close to turning/dying. For fun I decided to go wash myself (I already managed to heal myself once before, but I wasn't really sure it would work again) and somehow I got fully healed.
fullheal.mkv