Hello All,
I just checked my box as I was about to reboot it (after patching) and I have the same behavior on all my storage. However this is no NFS storage, it is ZFS-backed storage. That indicates to me that it is not specific to the storage type.
Freespace should not be an issue on my end as well.
Before reboot I was running on 4.13.4.1 kernel, after that I am running on 4.13.8.3
Would be interested as well about this, because it concerns me a bit.
Best regards
Thomsa