On QUBES-OS 4.2.4, standard XFCE GUI, I have noticed something quite strange and disconcerting lately. Moving the mouse-wheel when the mouse pointer is over empty desktop space anywhere on the screen is causing the desktops to suddenly change! It even flicks through the whole range like some kind of kaleidoscope!
How can I get QUBES-OS to STOP messing around with my selected desktop when the mouse-pointer gets moved over empty desktop space?