Server reboot/shutdown with log "systemd: Started Delayed Shutdown Service".

Issue

• Server reboot/shutdown with message systemd: Started Delayed Shutdown Service:

# cat /var/log/messages
[...]
<hostname> systemd: Started Delayed Shutdown Service.  >>>>>>>>>>
<hostname> systemd: Stopped target Sound Card.
<hostname> systemd: Stopping Thunderbolt system service...
<hostname> systemd: Stopped target Graphical Interface.
<hostname> systemd: Stopped target rpc_pipefs.target.
<hostname> systemd: Stopped target Multi-User System.
<hostname> systemd: Stopping irqbalance daemon...
<hostname> systemd: Stopping Remote quota server..