Gnumeric has a generic Wayland icon in Taskbar / Window Switcher. It does not have its proper icon. STEPS TO REPRODUCE 1. Open a KDE/Wayland session 2. Launch Gnumeric OBSERVED RESULT In the taskbar and window switcher, Gnumeric has a generic Wayland icon (white "W" on a yellow background). EXPECTED RESULT Gnumeric should have its proper icon. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Debian Bookworm (available in About System) KDE Plasma Version: 5.25.5 KDE Frameworks Version: 5.98.0 Qt Version: 5.15.4 ADDITIONAL INFORMATION I filled the bug against Gnumeric but their devs suggested to fill it also against KDE: https://gitlab.gnome.org/GNOME/gnumeric/-/issues/677#note_1566363
This is a gnumeric issue, see https://gitlab.gnome.org/GNOME/gnumeric/-/issues/677#note_1566511