`command not found` when connecting to OpenSSH server using Git Bash as DefaultShell and disabling pseudo-terminal allocation

Prerequisites

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• Make sure you are able to repro it on the latest version
• Search the existing issues.

Steps to reproduce

1. On machine running OpenSSH server, install Git Bash and set DefaultShell for OpenSSH Server to the path of Git Bash (on my machine, I used D:\Programs\Git\usr\bin\bash.exe).
2. On another machine, connect to the OpenSSH server with ssh -T <host_address>.

I am attempting to use VS Code Remote-SSH to connect from my laptop to my desktop (running OpenSSH). This fails to connect. The underlying command being used is ssh -T <host_address>. I have configured OpenSSH to use DefaultShell to be Git Bash. Note: clearing this makes it work though now when I need to ssh into my desktop I need to manually run bash.

Expected behavior

> ssh -T <address>
echo hi<C-d>
hi

Actual behavior

> ssh -T <address>
/d/programs/git/usr/bin/bash: line 1: : command not found
/d/programs/git/usr/bin/bash: line 2: : command not found
/d/programs/git/usr/bin/bash: line 3: : command not found
/d/programs/git/usr/bin/bash: line 4: : command not found
/d/programs/git/usr/bin/bash: line 5: : command not found
/d/programs/git/usr/bin/bash: line 6: : command not found
/d/programs/git/usr/bin/bash: line 7: : command not found
/d/programs/git/usr/bin/bash: line 8: : command not found
/d/programs/git/usr/bin/bash: line 9: : command not found
/d/programs/git/usr/bin/bash: line 10: : command not found
/d/programs/git/usr/bin/bash: line 11: : command not found
/d/programs/git/usr/bin/bash: line 12: : command not found
/d/programs/git/usr/bin/bash: line 13: : command not found

Error details

Environment data

I am not running Powershell

Version

9.5.4.1

Visuals

No response

Reproduce the setup with Windows OpenSSH, Git Bash as DefaultShell, and ssh -T, then compare it with a connection that uses a pseudo-terminal or the default shell. Trace how the server handles non-interactive input and confirm that the expected echo hi output is produced without repeated command not found messages.