Funny. Found an unexpected way to fix the black background on the Lock Screen. For that, you need to enable the animation when minimizing windows! Just checked: turn off the animation (and I did it to speed up the interface), and the background stops displaying on the Windows lock screen page. Well, what’s the connection here?…
“…having Animate windows when minimizing and maximizing unchecked in Visual Effects settings will have the lock screen background not show properly when “Show lock screen on sign-in screen” is turned on.
