Flatpak app disapear in Elementary OS 8.1 sometimes.md

A developer reports that Flatpak apps disappear in Elementary OS 8.1 after certain package installations or repository additions. The developer shares a troubleshooting solution involving reinstalling Flatpak and AppCenter, updating the appstream, and refreshing the desktop database, with commands to set up an alias for convenience.

I installed this new version of elementary OS 8.1 and kept running into issues with package installations. To be honest, I’m not exactly sure what the root cause is, but in some cases—after installing something via the terminal or adding a repository—Flatpak would suddenly disappear, taking my Flatpak-based apps with it; this happened twice. However, after consulting Claude, I found a troubleshooting solution that works, and I’m sharing it here. If anyone else is a beginner or doesn't know the fix, you can simply copy these commands. I even set up an alias for them in ~/.bashrc . sudo apt update sudo apt install flatpak apt-cache search appcenter apt-cache policy appcenter sudo apt install --reinstall appcenter sudo flatpak update --appstream flatpak repair update-desktop-database ~/.local/share/applications 2 /dev/null gnome-session-quit --no-prompt or maybe you can try short version if work flatpak repair && sudo flatpak update --appstream && update-desktop-database ~/.local/share/applications or alias icon disapear fix='sudo apt update && sudo apt install flatpak && apt-cache search appcenter && apt-cache policy appcenter && sudo apt install --reinstall appcenter && sudo flatpak update --appstream && flatpak repair && update-desktop-database ~/.local/share/applications 2 /dev/null && gnome-session-quit --no-prompt' or you can change to another alias name or maybe you can try short version if work alias fix flatpak='flatpak repair && sudo flatpak update --appstream && update-desktop-database ~/.local/share/applications' and you must be Sign Out first from your session to refresh your flatpak app list