On May 21 about 9-10pm I was playing in MunTuy Cellars with a friend leveling and partaking in a levequest and started getting attacked by Dreadwolf that was no where to be seen, literally. After I was about dead it appeared. But I was never able to attack it as I can't target a Mob that is basically invisible. The Wolf was straight up past the Aetheryte Crystal. We've leveled down there quite a bit and have never seen a aggro Dreadwolf pop there at all, this was the first time. I don't know if this happened to anyone else but after we killed it, we were able to level there another few hrs and nothing ever respawned there at all