NavigationPath and navigationDestination with custom back button fails on iOS 17 BETA

Using the new navigationDestination and NavigationPath functions previously on iOS 16 everything has been working fine using a custom back button, which calls path.removeLast().

However, if we try this on iOS 17 BETA 5, the screen being removed flashes white.

Also, how can I raise this as a bug with Apple, so they can fix it before the release of iOS 17.

You can try this code as an example (NOTE THE WHITE FLASH ON REMOVE LAST):

struct DetailView: View {
    @Binding var path: NavigationPath

    var body: some View {
        ZStack {
            Color.black
            VStack(alignment: .center) {
                Spacer()
                Button(action: {
                    path.removeLast()
                }, label: {
                    Text("BACK")
                })
                Spacer()
            }
        }
    }
}

struct ParentView: View {
    @State var path: NavigationPath = .init()

    var body: some View {
        NavigationStack(path: $path) {
            ZStack {
                Color.red
                VStack(alignment: .center) {
                    Spacer()
                    Button(action: {
                        path.append("TEST")
                    }, label: {
                        Text("FORWARD")
                    })
                    Spacer()
                }
            }
            .navigationDestination(for: String.self) { _ in
                DetailView(path: $path)
            }
        }
    }
}