That is due backups are "pushed" into PBS, not scheduled and managed by PBS. PBS works just like storage space, it does not know if job was run or not.
So, now I know why GFS2 is unsupported from proxmox side... It works and performance was also very good, but it breaks after some time (more than half a year). Then it is pain, when everything is stuck and all pve nodes need to be restarted and...
In my home lab, I renamed the network interfaces using:
pve-network-interface-pinning generate --prefix eth
After that, I deleted the originally generated files from /usr/local/lib/systemd/network/
(in my case the file was named, for example...