snaps are only allowed to match the desktop file they provide, so StartupWMClass does not actually matter.
For rawtherapee, it seems that snapd is unable to determine its desktop file: $ snap routine portal-info $(pidof rawtherapee) [Snap Info] InstanceName=rawtherapee AppName=rawtherapee DesktopFile=. CommonID=com.rawtherapee.RawTherapee HasNetworkStatus=false ** No longer affects: gnome-shell-extension-desktop-icons-ng (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/2092803 Title: GNOME dash not grouping snap application instances according to same WM_CLASS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2092803/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
