I think in DDG’s case, it might re-submit on preview because it already “knows” the post number in the database, since your reply was already submitted.
Next time, when after a time-out you backspace into the thread, copy the post just in case (put it in Word or something) and go back to the thread itself (BEFORE you hit “reply”), and then hit refresh. It reduces the chance of a double-post.
Well, does that all count as a “bug” or not? It seems to me that software ought to regard “submit” as “submit” and “preview” as “preview” and that never the twain should meet, or at least be confused for one another by software that ought to know better, having been introduced to both of them separately on many occasions…
I think the software isn’t set up to process previews of already submitted posts, and that’s what goes wrong.
Doesn’t happen all that much, I think.
DDG - if that’s really the problem (treating preview as submit) then yes I would call it a bug.