While performing the Khitomer quests I got an invite to join a group just as i was using the transporter to go to the transporter to fight the borg at the barricade. Though I could accept and join the group the invite window remained and no matter what option I clicked (accept, decline, or the X) it would not close. It gave me an error that Idid not have an invite to the group. The windown was moveable tso I dragged it a section on my screen that wasn't in the way. As I was being transported I lost connection and when I logged back in the screen was no longer there.