Tried this event for the 1st time this morning. At the final boss, at some point I was hit with a Chilled condition. Having been unfamiliar with this fight, I thought it was simply part of the mechanics, but that condition remained for a few minutes and had no timer on it. When I was targeted by Freezie's purple laser wall, obviously I couldn't really avoid the damage and went down, and the rest of the group expired soon after.
Back at the waypoint though, I still had the Chilled condition along with it's effects (reduced movement speed, etc). I had to exit the instance for it to disappear, and when I re-entered it was gone. Had to log off and leave for work afterwards so wasn't able to see if it happened again.