The Dokany drive is not mounted for privileged processes with the same user account.
The biggest problem is, that this way it is not possible to copy files into folders where admin permissions are needed.
E.g. copying files from the Dokany drive to C:\Program Files\ … fails is UAC is enabled.
The UAC prompt will ask to allow the copy process. After allowing it, it will fail with the message that the drive (e.g. D:) is unavailable.
Running explorer.exe with elevated permissions will also show that the Dokany drive is not available.