The rest stays put
The AI redraws the whole picture on every edit, so faces and small details could drift. When you ask for a change in the chat or on a Suggestions card, Native now keeps the AI's result only where the change is, when it can hold the change to that part.
What's new
Ask to take off something an earlier edit added, such as sunglasses, and Native can put that part back as it was
A new background, a restyle, a font or logo change, longer words or a change across most of the picture still redraw all of it. So does an edit to a picture with your exact logo file, or to an ad's picture