Inconsistent internal onebox spacing

Apologies for bringing this one back up but thought I could piggyback off this topic (instead of starting a new one…)

Im sure this is well known but with the onebox internal link, if it’s expanded it looks good- but by default, the view has no formatting.

Before expanding…

When you expand it looks good.

Unless the OP quotes text, shouldn’t the preview hold the formatting - instead of trying to fit as much text as possible into the box?

Or am I missing something and all this is by design?