It seems that with Xcode 16.4 and iOS 18.5 beta 4 SDK Apple has solved this issue (even if there are no evidence in the release note) @ykroh1 @chrisfromboulder

I have the exact same issue of @ykroh1 . Each time I open or create a new document, a new toolbar gets added to the navigation bar. It is pretty much unusable and we can’t ship documents app in this state with SwiftUI. please fix this bug.