It seems that similar bug can be triggered when light-locker is running in parallel with xfce4-screensaver, see https://bugs.launchpad.net/xfce4-screensaver/+bug/1875025. I'm afraid that this will cause problems for people upgrading from Xubuntu 18.04, where light-locker was installed by default AFAIK.
It seems that similar bug can be triggered when light-locker is running in parallel with xfce4-screensaver, see https:/ /bugs.launchpad .net/xfce4- screensaver/ +bug/1875025. I'm afraid that this will cause problems for people upgrading from Xubuntu 18.04, where light-locker was installed by default AFAIK.