Hang when PutFiles using .NET assembly

I'm using the .NET assembly to upload files to my test SFTP server. This part is working fine. I wanted to see what would happen if I turn the SFTP server off during a call to session.PutFiles. The method just hangs and never returns. I've tried adjusting the session timeout but this has no effect.

I would expect some sort of timeout to happen and have it return control back to my application but this is not the case.

Is this a known issue?

Thanks

WinSCP is trying to reconnect indefinitely on the background.
The next version will allow limiting time it tries to reconnect:
https://winscp.net/tracker/860