MAC Error when SftpClient.DownloadFile(UWP)

まず、提供された OpenSSH 7.9 サーバーの詳細を使って、SftpClient.DownloadFile で x64 UWP ケースを再現し、SftpClient.OpenRead と比較します。SftpClient.InternalDownloadFile から SftpSession.GetCanonicalPath、RequestRealPath を経由して失敗を追跡します。完了の条件は、MAC エラーの原因が説明され、影響を受ける転送パスが例外なしで動作することです。

Remote Server Information
Remote SSH Server version: SSH-2.0-OpenSSH_7.9
Remote Operating System distribution name and architecture: Linux aarch64
What kind of access do you have?: Full physical and software access
Does Putty/WinSCP work?: yes

Local Machine Information
Operating System: Windows 10 21H2
.NET SDKs versions installed: 2.1.511, 2.1.801, 5.0.400

Project information
What is your target framework and architecture?: x64 UWP
Is your project multi-threaded/complex?:

Source Code
Sample Code:

Sample Code:
var sftp = new SftpClient(MyIp, MyLogin, MyPassword);
sftp.Connect();
var memStream= new MemoryStream();
sftp.DownloadFile($"/opt/myfile.json", memStream);

Exceptions and Stack Trace/Call Stack:

Renci.SshNet.Common.SshConnectionException: MAC error
   at Renci.SshNet.SubsystemSession.WaitOnHandle(WaitHandle waitHandle, Int32 millisecondsTimeout)
   at Renci.SshNet.Sftp.SftpSession.RequestRealPath(String path, Boolean nullOnError)
   at Renci.SshNet.Sftp.SftpSession.GetCanonicalPath(String path)
   at Renci.SshNet.SftpClient.InternalDownloadFile(String path, Stream output, SftpDownloadAsyncResult asyncResult, Action`1 downloadCallback)
   at Renci.SshNet.SftpClient.DownloadFile(String path, Stream output, Action`1 downloadCallback)
   at RouteLoader2022.Loader.Network.FtpRouteAnalyzer.<>c__DisplayClass0_0.<AnalyzeAsync>b__0() in E:\Repos\RouteLoader2022\RouteLoader2022\Loader\Network\FtpRouteAnalyzer.cs:line 42

File transfer related
Transfer over LAN or Internet?: LAN
File size in bytes: 29876 Bytes
Uploading or Downloading? Downloading
Does remote server have enough space to store the file? Yes
Do you have access to the file being uploaded or downloaded? Yes

Increasingsize of SftpClient.BufferSize doesn't help
When do var readStream = SftpClient.OpenRead and then readStream.Read/ReadByte/ReadAsync same MAC Error exceptions throws