Problem opening workspace switch properties
When I right click to open the properties of the pager plugin, sometimes the panel apparently restarts. Sometimes, the panel and also xfwm4 seem to restart.
My .xsession-errors displays this:
(xfce4-panel:6240): Gtk-WARNING **: 10:59:53.180: Content added to the action area of a dialog using header bars (xfwm4:5839): Gdk-ERROR **: 10:59:53.627: The program 'xfwm4' received an X Window System error. This probably reflects a bug in the program. The error was 'BadWindow (invalid Window parameter)'. (Details: serial 738204 error_code 3 request_code 2 (core protocol) minor_code 0) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the GDK_SYNCHRONIZE environment variable to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.)
Using Xubuntu 20.10, xfce4-panel 4.16.0 and xfwm4 4.16.0.