Cancel back gesture bug with NavigationView

I suspect this may be related to a bug I filed with Apple a few days ago, FB7433665.

There's a `presentationMode` value in the Environment that defines whether an item is presented by another, and provides a way for it to be dismissed. I noticed that the mode's `isPresented` property changes to `false` immediately on the start of the swipe gesture, and it doesn't ever get reset to `true`. This may ultimately be causing the problems with the navigation bar update.

I'd recommend filing a bug with Apple, and referencing FB7433665 in your description.

Are there any workarounds? Like modifying the `isPresented` property of the subview in the `onAppear` of the parent view?

None that I'm aware of, unfortunately. The `PresentationMode` struct is essentially a small helper that ties into a larger, more private piece of SwiftUI. The `isPresented` property is read-only. Really all I can suggest is to pile on the bug reports. They've fixed several of my own gripes so far, so they're not unresponsive. They just need multiple people reporting the same bugs—more duplicates == higher priority.

Any updates on this? I am having the same issue here. Xcode 11.4 and iOS 13.3.

It's only happening in some of my navigation views, so I'm suspecting a developer error.

Edit: It looks like the problem occurs when I add a trailing button to the navigation view.

same here, Xcode 11.4.1 and iOS 13.4

Code Block 
struct MasterView: View {
    var body: some View {
        NavigationView {
            NavigationLink("Go", destination: DetailView())
                .navigationBarTitle("Master")
        }
    }
}
struct DetailView: View {
    @Environment(\.presentationMode) var presentation
    var body: some View {
        Text("Detail view")
            .navigationBarTitle("Detail")
            .navigationBarItems(trailing: Button("Close") { })
    }
}