SUMMARY Cannot figure out what causes it and journal logs does not give any information. Problem has been happening for a several months and possibly longer than that. Restarting plasmashell fixes the problem for a while. STEPS TO REPRODUCE 1. Have plasma run for a while (do tasks, lock screen, sleep, etc.) 2. Click on an application to launch it from the favorites menu 3. Application does not launch 4. Restart plasmashell 5. Application launches from favorites OBSERVED RESULT Application does not launch from favorites EXPECTED RESULT Application does launch from favorites SOFTWARE/OS VERSIONS Windows: macOS: (available in the Info Center app, or by running `kinfo` in a terminal window) Linux/KDE Plasma: NixOS 25.11 KDE Plasma Version: 6.4.4 KDE Frameworks Version: 6.17.0 Qt Version: 6.9.1 ADDITIONAL INFORMATION There was an additional bug encountered with tooltips being offset by a lot when hovering over an app in favorites. Minor issue in comparison.
Does the app launch if you use its command-line binary in a terminal window? e.g `Kate` for the Kate app and `plasma-discover` for Discover. Does the issue ever happen in a new clean user account on the same computer?
It's only an issue with launching from favorites and it doesn't seem to affect every app in there. I can always launch from the command line or from application categories/search. Have to check if this affects new user accounts.
I think I figured out what's causing it and it's probably NixOS related. This seems to happen sometimes during a `nixos-rebuild switch` happens (equivalent to a system update).
Let us know what you find there!