I have a problem with a MacCatalyst app I build and run on MacOS 14.6 with XCode 16.4. The problem doesn't occur on MacOS 13.6 or iOS 16 or 17. In this app if I click a button to show a .sheet(item a few times (typically between 3 and 8 times) then the app starts consuming 100% CPU and the Spinning Wait Cursor shows. The cause of the issue is that my NavigationSplitView has a ZStack so that state is maintained for all panels, as recommended here1 and here2. Minimum reproducible example is below. I would appreciate any suggestions on how to address this. This app must support iOS 16 and MacOS 13.6 as well. Thank you! import SwiftUI enum Panel: Hashable { case panel } @main struct MyApp: App { @State private var selection: Panel? = Panel.panel var body: some Scene { WindowGroup { NavigationSplitView { List(selection: $selection) { NavigationLink(value: Panel.panel) { Label("Panel", systemImage: "circle") } } } detail: { ZStack { // this causes a crash on MacOS 14.6, but is required to maintain state on 13.6 ContentView() } } } } } struct PopupItem: Identifiable { let id = UUID() } struct ContentView: View { @State var popupItem : PopupItem? var body: some View { Button { popupItem = PopupItem() } label: { Text("Show popup") .frame(maxWidth: .infinity, maxHeight: .infinity) } .frame(maxWidth: .infinity, maxHeight: .infinity) .navigationBarTitleDisplayMode(.inline) .sheet(item: $popupItem) { popupItem in DismissView() } } } struct DismissView: View { @Environment(\.dismiss) var dismiss var body: some View { NavigationStack { Button { dismiss() } label: { Text("Dismiss") .frame(maxWidth: .infinity, maxHeight: .infinity) } .frame(maxWidth: .infinity, maxHeight: .infinity) .navigationBarTitleDisplayMode(.inline) .toolbar { ToolbarItem(placement: .principal) { Text("Popup") } } } } }

When Swiftui Self._printChanges() prints StructName: @40 changed. what does the 40 represent ?

When Swiftui Self._printChanges() prints StructName: @self changed. How do I determine why self changed?