Thanks for getting back to me. One of my VMs (Windows 10x64) was acting a little laggy. Suspecting the CPU, I looked at the CPU pinning settings to realize that several docker containers (Bitnode, Ravenode, Jdownloader, Krusader) were not pinned to any cores. I have 16 logical cores on this server, 8 of which pinned by the Win10x64 VM, so I pinned the containers to an open dual set of cores. Upon clicking 'Apply' the 'Updating' spinning wheel appeared in front of each container. This went on for a couple minutes with no change so I began to watch TV and forgot about it. At least an hour later when I checked back, still the same story. Figuring a error, I hit refresh on the browser page and when it reloaded the containers were no longer listed on the CPU Pinning page. When I clicked over to the Docker tab, they were missing there as well. Hoping for the best, I rebooted the sever but they still appeared to be missing.
This is the point at which I wrote the post. Afterwards, I attempted to reinstall the containers using the pre-existing images and appdata (or whatever) but they wouldn't function properly despite having the appear of proper configuration using the previous data/settings. So, I ended up having to reinstall all of them after deleting any previously existing data, images, or settings.