I had this (Among other weirdness with UnRaid) issue with a previous version of UnRaid, so I decided to start fresh and install a new version of UnRaid and only import my data. I rebuilt my docker containers (did not re-use docker.img) and did resuse my libert.img so my VM's came across no issues.
After everything was said and done, everything was working great for a couple days. This morning though once again I'm seeing these errors in the syslog which I was also seeing in the logs