For a few years now I have had the image for the Lock screen of both my computers (desktop and laptop) set to "Windows spotlight". I am accustomed to having that picture -- often of beautiful "scenics", and often of lighthouses -- change every few days. Now all of a sudden the lock screen picture of the desktop computer has remained unchanging for more than a week, perhaps even two weeks. It's a beautiful photo of the center of Bruges, a city in Belgium (I've been there). I have nothing against the picture, quite the contrary, but do wonder that it has not changed in so many days. I note that during the same time period the "Windows spotlight" picture on my laptop has continued to change in the familiar way.
Is there some reason for this? There has been no change in the lock screen setting on either computer.