Windows 11 Some pictures work as desktop backgrounds whilst others don't, and display as a solid black wallpaper

[Ethan Vale]

The pictures in question are very high resolution, but I have managed to get a 7130x5425 picture to display just fine using the slideshow setting, so I'm not sure if its related to resolution. When I manually set the background in the personalisation settings, it immediately switches over to the 'Solid Colour' setting for these pictures. The pictures have no trouble opening in the 'Pictures' app, nor are they in a different file format than the other pictures that do work. Anyone have any idea what might be happening here?

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