ssh-keygen.exe -T hangs

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Please answer the following

If it is a terminal issue then please go through wiki https://github.com/PowerShell/Win32-OpenSSH/wiki/TTY-PTY-support-in-Windows-OpenSSH

"OpenSSH for Windows" version 0.0.20.0

Server OperatingSystem win10 Client OperatingSystem Win10

What is failing ssh-keygen.exe -t ed25519 -T c:\mykey hangs

Expected output this is invalid usage of the app, but the app should not hang

Actual output hangs