Sorry, just saw this! Yup, it looks good to me now. I was viewing it on Jerboa (an Android Lemmy client), so it could just be that the Markdown parser is a bit stricter than Lemmy's/Hexbear's native parser. Let me try testing it myself in Firefox for Android to see what I see:

Aha! They both look fine in Firefox and Chrome, but the second one breaks in Jerboa. I also looked at the post from Lemmygrad and it still looks fine, so it's not Hexbear-specific.