[LH3648] Issue when returning from Composition Mode

Testing 2.9.0.41
Scrivener 3 is open in Full Screen (Maximize) on Samsung 27inch display, Windows 10 Pro Build 1903
Select F11 and Enter Compression Mode
Select Esc key to return to Full Screen (Maximize)
Scrivener screen only shows on 3/4 of full screen on Maximize.
Have to go to Restore Down (top right of screen) then Maximize again to get Scrivener to take up full screen
If I am in Restore Down to start with and go Esc - Enter Compression Mode and return, everything is okay.
Only happens on full screen.

Updated to current Beta (2.9.0.41). Clicked on ‘Composition Mode’ icon. Still a mishmash of dark mode with dark text. I know you can change the colours yourself, but that’s the default. Useless.
Cannot click on ‘Return’ icon until click on text area. No pop-up menu until you do.
Click on ‘Return’ icon. Does not work. Did up to 2.9.0.40. Does not work now. ‘Esc’ works.