Hello. Yesterday I logged into ESO to get my tickets and got a key to an Imperial City Trophy Vault from the rewards of the event. The Ethereal Trophy Vault to be more precise. I didn't want the key to take an inventory slot so I quickly went to the Vault to use it. When I arrived there was a warden enemy player from the Aldmeri Dominion inside. I was from Ebonheart Pact (The district was under EP control). I get inside and the Feral Guardian started attacking me. I could not leave the room, I could not heal and could not attack the bear. I ended up running inside. I managed to open the treasure but died shorty after. It's my understanding that while inside these rooms you can neither attack or be attacked so I'm guessing it's a bug. I laughed it off because I didn't lose anything but today I decided to report it because it might be the root of a more serious issue if people start abusing it.