I think you have a ticket on this issue with our support team. I have placed a note to them to find out what the cause is and to see if there is a reason why this is happening.

Can I ask you (Though I hate to do this ) - can you try to restart again or run the filesystem repair utility again, even again once more to see if it kicks on. Also try to turn off the NFS service from the NAS Settings then run the repair filesystem, restart and turn back on again.

Again sorry for the amount of effort to resolve this issue.