I was minding my own business in the Citadel, with two other people and I hear what sounded like someone attacking a door and that message popping up. Neither of the other two saw it.
I talked to cloud's player, and they said they weren't in the citadel but were attacking a tree or a werewolf when it occurred.
Also Cloud was on the of my player list at the time it occurred, so they had logged in directly before I did uncertain if that led to the glitch.