Hello!
Was leveling and I got into a random dungeon, ended up being a Cataclysm dungeon. We got into it and were clearing it slowly, but then we got to the troll area and realized that the scaling is like… way off. The tank, that was tanking just fine, got basically two shot by things and the mobs were suddenly not taking damage from anyone.
I’m not sure where else to report this, but that dungeon really needs to be looked at, but for now, if that loading screen pops up for that dungeon, it’s better to just leave and try again later.