I just checked, and there’s a report seemingly of the same bug,
No mention of the hypertext thing though.
N.B. Writing this post I see neither issue… I think because I initiated the post by selecting a quote. The issues only seem to occur when you click the grey “Reply” button at the end of individual posts.
I confirm. Various problems seemingly but only when you begin the post by clicking the grey “Reply” button. If I use the “Quote” button to start a new reply it works (and everything else).