I suspect it's probably not an issue with $SNAP being resolved. The "URL" for the icon of installed apps comes from ubuntu-app-launch. There's also the case where things in the store have icons, but they don't necessarily have an icon defined in the .desktop files, or it's pointing to the wrong thing. This issue is not in unity-scope-snappy though, but I am not yet sure where to move the bug.
I suspect it's probably not an issue with $SNAP being resolved. The "URL" for the icon of installed apps comes from ubuntu-app-launch. There's also the case where things in the store have icons, but they don't necessarily have an icon defined in the .desktop files, or it's pointing to the wrong thing. This issue is not in unity-scope-snappy though, but I am not yet sure where to move the bug.