I see 7 comments when I go to that page. Dig Dgraph fix something in the last hour? Or is the site treating you differently from me because I'm completely unknown to it?
Discourse prefers a single level threading model, until Reddit or HN. So, you can in fact see all the 7 comments there. Not sure why you only see one.
Here it says 7 comments. But you only get to see one. You have to click into the discourse post to get more. This is due to Discourse's threading model. 6 of the comments were replying to the one on the blog post itself.