Binding is working differently if used with sheet or navigation link

I try to use data binding within my view hierarchy. Depending how I call my subview the binding is working as expected.

Working example:

import SwiftUI

struct Person: Identifiable {
    let id: UUID
    var name: String
    var age: Int
}

final class PersonStore: ObservableObject {
    @Published var persons: [Person] = [
        .init(id: .init(), name: "Dirk", age: 28),
        .init(id: .init(), name: "John", age: 31),
        .init(id: .init(), name: "Fred", age: 25)
    ]
}


struct ContentView: View {

    @ObservedObject var store = PersonStore()

    @State var isEditing = false

    var body: some View {
        NavigationView {
            List (store.persons.indices) { index in
                HStack {
                    VStack(alignment: .leading) {
                        Text(store.persons[index].name)
                            .font(.headline)
                        Text("Age: \(store.persons[index].age)")
                            .font(.subheadline)
                            .foregroundColor(.secondary)
                        Text("Index \(index)")
                    }
                    Spacer()
                    Button("Edit", action: {
                        isEditing.toggle()
                    })
                }
                .sheet(isPresented: $isEditing) {
                    NavigationView {
                        EditingView(person: $store.persons[index])
                    }
                }
            }.navigationTitle("Persons")
        }
    }
}

struct EditingView: View {
    @Environment(\.presentationMode) var presentation
    @Binding var person: Person
    
    var body: some View {
        Form {
            Section(header: Text("Personal information")) {
                TextField("type something...", text: $person.name)
                Stepper(value: $person.age) {
                    Text("Age: \(person.age)")
                }
            }
        }
        .navigationBarItems(trailing: saveButton)
        .navigationBarTitle(Text(person.name))
    }
    
    var saveButton: some View {
        Button(action: dismiss) {
            Text("Cancel")
        }
    }
    
    func dismiss() {
        
        self.presentation.wrappedValue.dismiss()
    }
}


struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

When I replace the sheet view with a NavigationLink view, then the binding is broken.

struct ContentView: View {
    
    @ObservedObject var store = PersonStore()
    
    var body: some View {
        NavigationView {
            List (store.persons.indices) { index in
                NavigationLink(destination: EditingView(person: $store.persons[index])) {
                    VStack(alignment: .leading) {
                        Text(store.persons[index].name)
                            .font(.headline)
                        Text("Age: \(store.persons[index].age)")
                            .font(.subheadline)
                            .foregroundColor(.secondary)
                        Text("Index \(index)")
                        
                    }
                }
            }.navigationTitle("Persons")
        }
    }
}

The data in the EditingView is no longer directly updated. Only if I navigate back to the list, the changed data is shown.

Any ideas, where the binding is lost?