[Q] Posting: Links previews?

It appears from these threads on Github (1494, 1542, ) that Mastodon should be parsing the HTML of an URL and pulling in oEmbed or Open Graph elements to generate a preview in the timeline. Am I reading this incorrectly?

From a UX perspective, it appears like some people’s posts have link previews. But I’ve got two accounts, each on an instance running v2.5.1, and I’ve tried putting links in my post and all I end up with is a hot-linked URL–no preview.


Do you have links to the posts in question?