Julia: copy method on Azure Fileshares fails - Stat(...).inode is always zero

When copying data from \\azurefileshare\a\1 to \\azurefileshare\a\2 we get an error:

'src' and 'dst' refer to the same file/dir

After some investigation, it seems julia uses the stat command to determine if folders are identical by comparing the stat(xxx).inode and stat(xxx).device

However, the inode is always 0 for any Azure folders that we pass into stat(foldername).

Questions:

1. Have we misconfigured our Azure file shares?
2. Is this a bug in the stat() implementation in julia?
3. Is the julia inode comparison logic flawed?

Much appreciated.