When I’m editing a viewport, if I click multiple times to get out of the viewport screen as I do since I am trying to work fast, get into a viewport group to edit it and get out as fast as I can, I usually click say 3-4 times to leave a viewport edit bounding box and go back to annotating. When I do this the layout app starts flickering and my tray completely resets itself, the tray becomes more narrow as I originally set it up to be wider to view more of the contents and the windows rearrange, dissapear, etc. The tray basically resets. Try clicking a bunch of times when leaving a viewport edit bounding box to see if it can be reproduced. That’s all I can share on this.
Hope this gets fixed soon, will be more careful with the amount of clicks I make when leaving a viewport.