New GitHub account creation doesn’t redirect back to Giscus comments in blog

How to reproduce the bug (in the browser's incognito tab)

• Open a blog post having Giscus integration (eg. this one).
• Scroll to the bottom & click Sign up with Github to comment on the article.
• In the GitHub sign-in popup, click on Create an account.
• Create a GitHub account (by entering a username, email, and password). Github also asks for some preferences-related stuff.
• At the end, the https://github.com page opens - it doesn't redirect back to the blog page so the user can finish commenting.

What should happen

In the end, after the GitHub account creation is done, it should be redirected back to the blog so the user can finish leaving a comment.

I discovered this issue after integrating Giscus using <script> in my blog.