Thanks for sharing your findings.

Some days ago, my taskbar lost also "Snipping Tool" icon, so I've decided to look for a solution and try anything and everything.
And I did find this:
https://www.reddit.com/r/Windows11/comments/16v3rqk/comment/kpjxfgg/

But all I did was remove the Computer\HKEY_CURRENT_USER\Software\Classes\.png from the registry and restart explorer process and both icons are now back! Hurray :)
Although right click still shows context menu without the icon, but that's not a problem.

Please let us know, if you identify what causes the problem.
Btw, I do have the icon even in the context menu.

I've checked at home and here it works, although the right click menu is missing icon.
So it's likely something broken on my work PC.
Thanks anyway :)

I was using the ExplorerPatcher until last year when Windows finally added the [i]"Never combine taskbar buttons"[/i]. I suspect it may have left it's mark on the system even after I've removed it.

I'm pretty sure this issue appeared also on my home PC (I'll check when I get home), I'm not using it there much so I can't remember now.

I've tried to unpin and re-pin it many times using different methods (right click when the app is running, or search it through the start menu and pin it from there).
I've just tried to reinstall it but even that didn't helped.
I've tried to pin Inkscape which I also have from the Store and that icon works fine.
I've just looked up where the app is installed and if I pin the .exe file directly, it works as expected.

Are there some logs I could check?
But I agree this sounds like a Windows bug :(