Why do my advanced key settings for input languages keep resetting?
Solution 1:
Finally I managed to configure Advanced Key Settings in a way Win10 don't forget it between computer lock/unlock or reboots.
The trick is after "Change language bar hot keys" you should click on "Apply language settings to the welcome screen..." then click on button "Copy settings..." then check both "Welcome screen and system accounts" and "New user accounts" (I checked both just in case) and click OK. After this I've rebooted my computer and magic happened - my Ctrl+Shift+1 and Ctrl+Shift+2 hotkeys were working.
Try this workaround, hope it will help you.