Hi, in the Update Release Info you can read that CUPS-Service has to restart manualy. For me this fixed the problem:
CUPS update need manual intervention
After you update your system, update your systemd services like this:
sudo systemctl disable --now org.cups.cupsd.socket
sudo systemctl disable --now org.cups.cupsd.service
sudo systemctl disable --now org.cups.cupsd.path
sudo systemctl enable --now cups.service
sudo systemctl enable --now cups.socket
sudo systemctl enable --now cups.path