So, today I went on my druid to solo Anzu for the 7349th time. When I reached him, he was standing in the room, me having done nothing. I killed him (of course, without seeing the mount), and logged my pala. To my great surprise, Anzu was standing in the room on him as well, ready to be killed. Have I missed something? By reading MMO just about everyday, I haven't heard anything about this.
Edit: To me, it didn't look much like a bug, as parts of his room was redone (4 smaller bird statues, trash removed).