I have no idea why it has the root URL. I pasted the direct URL but it looks like HN didn't like it. I can't modify the URL unfortunately. If a moderator could update it that would be great.
You can fix your website: the post has a <link rel="canonical" href="https://www.blockloop.io/" /> in it, which tells the HN software that the main URL for your post is your homepage.
Thank you. I deleted that tag for now until I figure out how to set it properly with Jekyll. I'll admit that SEO is not something that I've worked with extensively.