Every once in a while after I’ve edited a post, the text of my post goes “poof!” and is replaced by this message, for no obvious reason I’ve ever seen. So far I’ve been able to undo it by more or less randomly reeling through the previous edits, re-editing them (and ctrl-C copying the edits just in case!), and then clicking on “save” while keeping my fingers crossed. But I figure there’s got to be some logical explanation for it, and a more straightforward way of undoing it.
I looked for a FAQ or a prior thread about this but could find neither. Can anyone enlighten me? Why does it happen? And what is “flagging”?