Issues with No Subject

Using Chrome Version 55.0.2883.87 I recently posted a reply to an "old" (maybe 30 days) email thread using the "reply" button on the thread itself. I noticed that when I clicked the "reply" button i got a pop-up window that did not include the subject line (i chose the option to reply in the UI and did NOT "reply via mail client"). I would call that the first problem since I would expect it to have had an "RE: " as the subject.

The second problem showed itself after I posted my reply. Note that I did not bother to edit the subject line, thinking that perhaps ponymail would sort the problem out on its end behind the scenes. In the end, the post appeared as expected, but with an empty subject (so my hope that ponymail would quietly resolve the lack of a subject in the background was proved wrong). That wouldn't be so bad, except that the real killer was that without a subject I found it impossible to click on the thread to read it (not sure if there was some workaround to that).

Reproduce the report by replying to an older email thread in the web UI with Chrome, using the in-page reply option rather than a mail client. Inspect the reply form and the resulting thread view, focusing on how the subject is populated and how messages with an empty subject are opened. Done means the reply has an appropriate subject and the resulting thread remains readable.

Written by the indexing model from the issue text.