Folders and files out of sync [RN104]

I purchased a ReadyNAS 104 a couple of months ago and have been using it without much of an issue, however I recently noticed something quite strange. When copying certain files and folders to the NAS remotely using ReadyCloud, they sometimes do not appear on some clients. Some things I have noticed are that they will always appear on the computer that has uploaded them, on the mobile app and on the web interface, however accessing the share over the local area network (SMB) or on other remote clients using the readycloud desktop app for Windows will often not show certain files and folders which have been recently copied to the share from remote clients. The files are evidently on the NAS as they appear when accessing it as root, however there seems to be some strange permissions bug which neglects to show files in some cases. This is quite a serious problem for me as I had been using the ReadyNAS across multiple devices both remotely and locally to maintain a current set of folders.

I am currently connecting from a Linux machine via SMB and have noticed that by trying to access the files/folders directly which do not appear I get a 'permission denied' error, however typing a file path which simply does not exist gives a different 'file not found' error. This leads me to believe there is something strange happening with file permissions on the NAS.

Technical information:

Device: ReadyNAS RN10400 running ReadyNAS OS: 6.4.1

Clients: 3xWindows 10 remote clients, 1xWindows 10 local client, 2xXubuntu 14.04 local clients, 2xAndroid 5.0 clients (local and remote).

ReadyCLOUD desktop client version: 1.9 ReadyCLOUD mobile client version: 1.2.2

Note that in the above example, the files in question were all uploaded from remote clients using the Windows desktop version of ReadyCLOUD. All the clients are accessing the same share with the same login credentials. The files are also being manually copied to the ReadyNAS share, the 'sync' feature is not used.