Invalid handle for simultaneous downloads.

I’m using a single SftpClient to download multiple files simultaneously. On one of a servers, I get "Invalid handle" error from time to time.
SSH.NET version 2024.2.0, .Net 9.
In connection logs I only see this version: Remote version: SSH-2.0-2.0

			"HResult": -2146233088,
			"Message": "Invalid handle.",
			"Source": "Renci.SshNet",
			"StackTrace": "   at Renci.SshNet.Sftp.SftpSession.RequestClose(Byte[] handle)\r\n   at Renci.SshNet.SftpClient.InternalUploadFile(Stream input, String path, Flags flags, SftpUploadAsyncResult asyncResult, Action`1 uploadCallback)\r\n   at Renci.SshNet.SftpClient.<>c__DisplayClass56_0.<BeginUploadFile>b__0()\r\n--- End of stack trace from previous location ---\r\n   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)\r\n--- End of stack trace from previous location ---\r\n
			"TargetSite": "Void RequestClose(Byte[])",
			"Type": "Renci.SshNet.Common.SshException"

   at Renci.SshNet.Sftp.SftpSession.RequestClose(Byte[] handle)
   at Renci.SshNet.SftpClient.InternalUploadFile(Stream input, String path, Flags flags, SftpUploadAsyncResult asyncResult, Action`1 uploadCallback)
   at Renci.SshNet.SftpClient.<>c__DisplayClass56_0.<BeginUploadFile>b__0()
--- End of stack trace from previous location ---
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)

Start with SftpClient.BeginUploadFile and InternalUploadFile, then follow the SftpSession.RequestClose call shown in the stack trace. Inspect how a single SftpClient handles simultaneous operations and try to reproduce the intermittent error against the reported server conditions. Done means identifying the cause and verifying a fix or regression coverage.