Ask HN: Is it no longer possible to start discussion on a self-submitted link?

I posted a neat link a few minutes ago that is a new article format Typeform has created combining a chatbot with an article to make it interactive.

Usually, when I submit a link, I like to kick off the comments in a way that adds context or clarifies if the landing page might be unclear. However, on this particular link there is no discuss button.

Has this feature changed recently? Can others see this link?

[1]: https://news.ycombinator.com/item?id=13806064