There weren't any backup jobs or special activity happening at that time.
4 VM's and 1 CT were running at the time. Load around 4%.
No GPU passthrough but I do have a HBA passed through and sometimes when rebooting TrueNAS it doesn't find the pool and I have to reboot pve to get it working...
When looking at the logs I found this:
Nov 13 00:00:29 a520mk systemd[1]: Starting dpkg-db-backup.service - Daily dpkg database backup service...
Nov 13 00:00:29 a520mk systemd[1]: Starting logrotate.service - Rotate log files...
Nov 13 00:00:29 a520mk systemd[1]: Reloading pveproxy.service -...