An option in song generation preferences to automatically rebuild BIAB backing tracks whenever a chord
is changed in the chord arrange window would be cool

I was just in a situation in which i made some chord changes on the fly, evolving it as i went, creating the melody at the same time as deciding the changes, and played the song but was surprised that
the backing tracks didnt reflect my chord changes. Of course this was because ( far as i know anyway )
i need to tell RB to regenerate MANUALLY.

At the very least some kind of optional warning to reminding you to rebuild would be helpful.