- Go to a Flow board with some existing comments.
- Start writing a reply to one of them. Don't submit.
- Start writing a reply to another. Submit it.
Observed: The first comment is lost.
This probably shouldn't happen. I expect one comment to be submitted and the the other two to stay and wait for submission. (Auto-saving them as drafts would make a lot of people happy about not losing their work. Quora does it.)