Many folks have posted on these forums and other I have talked to on guild discord and chat about how they are getting kicked from dungeon groups because of this UI error, and the time it takes some folks to recover from it. PUG are not waiting for folks that have to restart their game because for some folks this UI error locks up their controls.
Hey, that UI error happened to me yesterday. Couldn't do a darn thing....had to completely restart my system (Xbox) and by the time I tried to rejoin the pick up group....they had finished (Elden Hollow I)...