ReadyNAS 424 - Losing some folder share permissions for readycloud users after reboot.

I have recently started having the problem of having some of my shared folders lose permissions for users connecting over readycloud after a reboot or power loss. It only seems to affect some folders and only cloud users. I have compared the affected shares with other shares and all the settings are identical. Anyone have an idea on why some cloud users lose their permissions and have to be reset?