SFTP Mirror drive trying to move file error

Bit confused with this error don’t know if is a bug have had this problem since installing can’t find anything to make it work

Setup a download folder in media folder dataset tank

2x12TB Mirrored

When trying to move folder or file in downloads to media I get error incorrect volume

I am owner of both directory’s and also a user in acl with full access

Any suggestions or any information I’ll be happy to provide

It will work in ssh but not sftp