When we engaged high priestess, I used intimidating shout to fear all the adds. Solaris was feared on top of something on the wall. It then told us that 3/4 bosses had been killed and we had the option to leave the instance so we did. When we got back, high priestess was dead and there was no loot available for anyone.
just had this happen to me. Ive had this happen on retail as well but i believe that’s because she dies too fast. I just solo’d it as a prot paladin, she died first then the others but the fight took around 2 minutes. I usually farm this everyday and it seems completely random when shes unlootable