I confirm the problem in Debian Testing and XFCE. On the same system there is also MATE installed, and the issue doesn't happen.
I somehow managed to solve uninstalling the xserver-xorg-video-nouveau package.
I confirm the problem in Debian Testing and XFCE. On the same system there is also MATE installed, and the issue doesn't happen.
I somehow managed to solve uninstalling the xserver-xorg-video-nouveau package.