Program Freeze Ultra-Wide Screen [bug beta 18]

I’m running beta 18 on an ultra-wide screen. While in Corkboard mode (Dark Mode Theme) I enlarged the screen width then reduced it back to regular successfully. But when I enlarged the width a second time the background that enlarges turns white and the program goes into a freeze (cursor spinning as a circle). Have to kill it with Task Manager to start it up again.

I’ve ran into this problem 3x already to confirm consistency.