Hii,
Well apparently this is a bug, many users are having the problem, you can fix it using third party software, currently there is no confirmation that the taskbar will remain in the background.
https://github.com/dechamps/RudeWindowFixer/releases/tag/RudeWindowFixer-0.2a
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
If my answer helped, please accept the answer if possible, or not.
Thanks