It sounds like the account may be corrupted. Test for account corruption by creating a new Local Admin account to see if the problem goes away. Step-by-step instructions here:
https://www.isumsoft.com/windows-10/3-ways-to-c...
Sign into the new account, test it works correctly, if so move files over, test all apps work or reinstall any that don't. Then when ready delete the old account in Settings > Accounts > Family & Other Users.
You can also try to Repair the old account by running a Repair Install from the new account, steps here: https://www.tomshardware.com/how-to/fix-windows...
You can change it to your Microsoft account if desired:
https://www.tenforums.com/tutorials/5375-switch...
Based on the results you post back I may have other suggestions if necessary.
______________________________________________
Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.