That's yet another reason why USB drives aren't recommended for use as array drives (even though you're not using it like that). Oft times the bridging plays havoc with SNs, SMART etc.
If you want to use them in a VM, then they have to be isolated from the OS, and since they're usable within a container, they aren't. Tools - System Devices to isolate them.
As far as I know, Mover when set to Prefer has always moved from the array to the cache drive / pool. It doesn't think about included / excluded disks when moving that direction.
Is nzbget running? Go back into sonarr's settings and check it's settings...
Within nzbget double check your indexer settings... (Did you pay your bill?)
Something akin to this
<PLUGIN name="&name;"
author="&author;"
version="&version;"
pluginURL="&pluginURL;"
support="&supportURL;"
icon="gear"
min="6.9.0-rc2">
Once that's there then I'll remove the moderation that's preventing it from appearing in CA
Yup. Better to have set the min attribute as 6.9.0-rc2 in which case 6.8 while it would show an update available wouldn't allow you to actually install it.
Looks like a very slow network to initialize. Since duckDNS is running as host, set it to the first container in the list, then in advanced view, set a delay on it for say 20 seconds to see if it improves things.