There have been many reports of the scroll position for notes not being retained when opening a different note, or even when leaving the app and then returning to it. Most of these reports were of the ‘feature request’ kind. But really, having to look through a long note to find the place where you were last editing it is a terrible nuisance, and not retaining scroll position should count as a bug.
Please, developers, fix this one first. It’s the sore thumb of an otherwise brilliant and beautiful piece of software.