Thursday evening (Europe), most instances bugged, 2 or 3 worked. I was in an instance and more PvP duells were running as PvE. At some point a HoX enters the instance and starts to duell with the other players. He beats 'em all up one by one. After a hour no more PvP duells were going, i look around only the HoX was left, then he leaved too.