SSH.NET TimeOut doesn't work above a certain time frame

I am using SSH.NET library to create sftp client. I need to resume the download if network connection becomes available again within this timeout. I am using the below mentioned approach as shown in many examples.

        PrivateKeyFile ObjPrivateKey = new PrivateKeyFile(keyStream);
        PrivateKeyAuthenticationMethod ObjPrivateKeyAutentication = new PrivateKeyAuthenticationMethod(username, ObjPrivateKey);

        var connectionInfo = new ConnectionInfo(hostAddress, port, username, ObjPrivateKeyAutentication);

        try
        {
            using (var client = new SftpClient(connectionInfo))
            {
                client.ConnectionInfo.Timeout = TimeSpan.FromSeconds(10);

                client.Connect();

                if (!client.IsConnected)
                {
                    return false;
                }

                if (!client.Exists(source))
                {
                    return false;
                }

                var fileName = Path.GetFileName(source);

                using (var fs = new FileStream(destination + fileName, FileMode.Create))
                {
                    client.DownloadFile(source, fs, printActionDel);
                    fs.Close();
                    returnState = true;
                }

                client.Disconnect();
                client.Dispose();
            }
        }

I am unplugging the network cable to interrupt the download and test the timeout scenario. Though i enable the internet connection again within the timeout to resume the download, it is not resuming. Am i missing something here.

The report centers on SftpClient, ConnectionInfo.Timeout, and DownloadFile; start by reproducing the network-cable interruption with a 10-second timeout and trace how connection recovery is handled. Search for the timeout and SFTP download implementation and related tests, then establish the expected behavior when connectivity returns before the timeout.