I also have another weird issue where I map another path from the host to the docker and rather than showing up where it's supposed to, it shows up separated? in the list (subdirectories listed rather than located at mapped location in docker). However, when doing backups from these paths, they show the right path... very weird.
(In this case, I'm backing up some disk images so I've mapped in my /mnt/disks/ path so I can pick some stuff there. These are non-array disks.)
They should be mapped into /storage_disks but end up being listed separated (vm, vmfast, vmfast2, vmfast3).
But when backing up, show correctly: