When opening a commendation chest the game froze on the “pre loot” screen
I left it for a minute or so.
escape did nothing. had to alt f4 to get out of it.
enter opened the chat while 1 other player was still in my keep, after they left it no longer opened the chat window.
EDIT: on relaunch it does appear that I got the loot from the chest, it just didn’t show and gave me no way to exit.