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Win11 Task View shows a black thumbnail for certain UWP apps after waking from sleep
After waking the computer from sleep, the thumbnails for some UWP apps in Task View appear black or blank. Thumbnails for Win32 apps display normally, and the thumbnails for UWP apps also display no...
That pattern suggests the app’s preview isn’t being refreshed correctly after sleep, rather than a file-thumbnail cache problem.
When it happens, first bring an affected app to the foreground and resize its window, then reopen Task View. If that restores the preview, it points toward a redraw/resume issue.
If not, save your work and try Win+Ctrl+Shift+B to reset the graphics driver. The screen may briefly flicker. If this restores several previews at once, the graphics/display path is worth investigating.
Update the affected apps through Microsoft Store and check for a graphics driver recommended by your PC manufacturer. If the issue started with a driver update, consider rolling it back.