I just wrote a short answer to this question. It was automatically converted to a comment because it was 'trivial'. I don't really agree with this, but ok.
However, the answer linked to a URL, and this broke the markdown when the comment conversion took place, since URL linking using numbered references isn't supported in comments. Not great, but ok...
I tried to fix the comment, editing it to use comment link syntax, but apparently that's not possible. Weirdly, I see my edited text in the answer box for that page, even though it's no longer an answer, and even though my edited text is not reflected in the rendered comment.
Seems like state propagation between answers and auto-converted comments is a little broken. If it's now a comment, shouldn't my answer box be blank? And shouldn't I be able to edit the comment? And if you're going to convert my text to a comment, shouldn't the link syntax be fixed as part of the process?