Fedora 43, Plasma 6.6.3/6.6.4: if I start Discover, close its window and then try to open it again, the icon in the Task Manager tray shows the loading animation for a few seconds before silently giving up. The process itself doesn’t crash, in fact I have to manually kill it to open a “fresh” Discover instance.
journalctl output doesn’t clear up much:
Apr 14 14:57:54 fedora systemd[1521]: Started app-org.kde.discover@1ca244efd76b4758bf42cf33d345314a.service - Discover - Software Centre.
Apr 14 14:57:54 fedora plasma-discover[32235]:QThreadStorage: entry 2 destroyed before end of thread 0x556e0192fe00
Apr 14 14:57:54 fedora plasma-discover[32235]:QThreadStorage: entry 1 destroyed before end of thread 0x556e0192fe00
This (or something similar at least) also occasionally happens to System Settings, but not often enough for me to reliably reproduce, meanwhile it happens to Discover every time.