This is a bug fix in the upcoming patch. To be honest, I haven't seen a Renowned mob in Ilshenar. But instead of preventing these from spawning, I would like to see some form of the Renowned in ALL the dungeons! I especially would like to have Renowned mobs in my favorite dungeon, Shame. All of these older dungeons need a remake, and it seems to me this would be a great way to do that. The special drops would need to change, but I think this concept was one of the best new ideas when the Abyss was introduced.