The application has a system tray icon while it is not activated in the Settings under UI. This leads to the behavior that the tray icon closes with an error message. There should be either an informational error message for the user or this tray icon should not be there, when the option in the Settings is not activated.
I installed the Flatpak Version and had this issue under fedora 42 with Gnome and KDE. ^^
I'm happy to answer any questions if you have any. ^^