1.5.15 MacOS Big Sur, unable to navigate unlocked folder under /Volumes

Recently, I’ve been unable to navigate the unlocked folder mount under /Volumes/Foldername. that is, using the shell and “cd” into it, and “ls” generates an error.

I can see the unlocked folder and its contents fine in the Finder windows.

I’ve quit and restarted the application, which did not resolve.

When I attempt to “cd” into the unlocked volume via the command line and perform a “ls” I get this error:

ls: .: No such file or directory

Anyone know what the issue is? I’m doing this as root, so it shouldn’t be a permissions issue. The physical container is stored on an external USB drive.