screensaver not starting

The xfce4-screensaver is running and enabled but the timer is not starting the screensaver. This behavior started recently. Sometimes I can temporarily fix this by changing a setting for the screensaver, sometimes it is also required to tinker with the power management and sometimes activating of the screensaver will fail at all (or I didn´t tinker enough ;-)).

Until recently the screensaver did it's Job. I don't know what to test and change any further and I would be glad to hear how I can trace this bug/fault setting somewhere.

Operating system: Arch Linux (and updated fully).

Specific information from bash:

$ps x | grep screensaver

1073 ? Sl 0:05 xfce4-screensaver

33175 pts/0 S+ 0:00 grep --color=auto screensaver

$ xdg-screensaver status

enabled

$ xfce4-screensaver --version

xfce4-screensaver 4.18.4

Specific other information: Because I use the suspend-then-hibernate (not available in Xfce4) option via systemd I disabled handling the handling of the laptop lid event. I did this by: xfconf-query -c xfce4-power-manager -p /xfce4-power-manager/logind-handle-lid-switch -n -t bool -s true so when I go to settings I get the warning: "Xfce Power Manager is not configured to handle laptop lid events". Until now this did not interfere with anything and I took care not to change it back.