I am building a new community and many current users consume information by looking at email digests. A lot of topics that I create contain quoted text (mostly forwarded emails from various existing mailing lists) sometimes accompanied by regular text but not always. I recently observed that the digest emails that go out to users do not contain quoted text at all if there is any accompanying text around the block quote. See screenshots below.
I investigated the Preview Digest and notice that the quote is actually included in the text version of digest, but not in the HTML version.
While a topic with just a quote shows up just fine in the HTML digest:
Something similar is happening to attachments in the posts.
Seems like a bug.