Wrong checksum

Hello, I have the same problem with https://github.com/sshnet/SSH.NET/issues/212
with sourceforge.net
but WinCSP works correct
Local sha256 is diff with server sha256

private static void HandleKeyEvent(object sender, AuthenticationPromptEventArgs e)
        {
            foreach (AuthenticationPrompt prompt in e.Prompts)
            {
                if (prompt.Request.IndexOf("Password:", StringComparison.InvariantCultureIgnoreCase) != -1)
                {
                    prompt.Response = "anypass";
                }
            }
        }
  KeyboardInteractiveAuthenticationMethod keybAuth = new KeyboardInteractiveAuthenticationMethod("jjjj");
            keybAuth.AuthenticationPrompt += new EventHandler<AuthenticationPromptEventArgs>(HandleKeyEvent);
            ConnectionInfo conInfo = new ConnectionInfo("frs.sourceforge.net", 22, "iikk", keybAuth);
            using (var sftp = new SftpClient(conInfo))
            {
                sftp.Connect();
 using (FileStream fs = new FileStream(zip_path, FileMode.Open))
                {
                          sftp.UploadFile(fs, "file.zip");
                }
}

Start with the provided SftpClient.UploadFile call and trace how SSH.NET handles the uploaded file, comparing the local archive checksum with the server result. Done means reproducing the mismatch and identifying a confirmed cause or documenting why the report cannot be acted on.