Hi @sonvir249,
I have reviewed the patch mentioned above and able to apply it...

Hi @sonvir249,

I have reviewed the patch mentioned above and able to apply it cleanly and works as intended.

Steps followed :-

1. Added a comment type in Article content type.
2. Enabled Captcha for comment type and wrote a form_alter for comment type and made #access false for the form.
3. Able to submit the comment properly.

Hence patch works perfectly fine.

Thanks!