That likely suggests the mount is dropping or disconnecting temporarily. The issue is, after reconnect, docker doesn't detect it without a container restart.
I had a similar issue with a mounted smb share. Switched to docker mounted nfs, which doesn't drop (or maybe comes back properly).
While I have no idea why it may be happening, disabling and re-enabling the the addon will restart the container and the mount should come back (as long as it's reconnected on the host).
Yeah, thats what I figured... I guess I could mount the local drive as an nfs, either through Libreelec, or connect the USB drive to my router and share it out that way..
You're right, that restarting the addon brings the mount back.. but obviously thats not ideal, as I'm hoping to use Plex everywhere, even when I'm away from my NUC...
Would anybody know how to have docker re-try to mount temporarily lost drives? I'll try the linuxserver.io forums maybe..
I guess I could also try Escalade's Plex build inside Libre without Docker...last time I tried that script it failed out, but maybe another go at it, or use his RetroELEC build..
Thanks guys for confirming that I'm not the only one with this issue at least!