This has been happening for the last several days. I'll compose a Reply, Preview the Reply and get a Message "Your response is too short..." and the Reply Screen has been emptied. Yet, the Preview Screen has the content of what I'd composed as a Reply.

I'll then recompose the reply, copy it to Clip Board, Preview the Reply, Paste the Clip Board into the Reply Screen...which works...but...

This does not happen all the time. It did NOT happen in this Post.