Comment 4 for bug 1751291

The issue probably is that resources context Move uses os.Rename system call (resource/context/context.go:#139:
func (deps contextDeps) Move(target, source string) error {
        // Note that we follow the io.Copy() argument arder here
        // (os.Rename does not).
        return os.Rename(source, target)
}

This under ubuntu does not support moving files across file systems. From man 2 rename:
  EXDEV oldpath and newpath are not on the same mounted filesystem. (Linux permits a filesystem to be mounted at multiple
          points, but rename() does not work across different mount points, even if the same filesystem is mounted on both.)