`win->controlwindow` is never handed properly to `win->activewindow` in [`track_controled_window`](https://gitlab.xfce.org/panel-plugins/xfce4-windowck-plugin/-/blob/master/common/wck-utils.c#L131) Another expression is needed to check if the active window is the desktop window like so:[show_on_desktop.diff](/uploads/18284bed20873e72c1a6a8706778193a/show_on_desktop.diff) [The topic](https://forum.xfce.org/viewtopic.php?pid=67443#p67443) on the Xfce Forums.