UWP app changes wallpaper fit on multiple monitors

[t1m0thyj]

UWP app changes the wallpaper fit from "Fit" to "Span", rather than leaving it set to whatever the user last selected in Windows 10 Settings. The desktop app does not have this bug though.

[t1m0thyj]

Discovered the TrySetWallpaperImageAsync function for UWP apps, need to test it and see how it behaves: https://docs.microsoft.com/en-us/uwp/api/windows.system.userprofile.userprofilepersonalizationsettings

[t1m0thyj]

I can't get this to behave consistently, with either the SetWallpaper DLL call or the TrySetWallpaperImageAsync function. Now on my PC with multiple monitors the UWP app always forces "Fill" instead, and I have no idea why this behavior changed. This seems better than forcing to "Span", but still not ideal because changing the wallpaper shouldn't be changing the fit.

[t1m0thyj]

This issue is still outstanding, but closing it since it is now documented in Known Issues.

[t1m0thyj]

Reopening as the workaround documented for the issue to reset the app no longer seems to work in Win11.