When I push more than one view, multiple back buttons are visible in the navigation bar.
struct ContentView: View {
    var body: some View {
        NavigationView {
             NavigationLink(destination:SecView()) {
                   Text("Primo")
               }
        }
    }
}
struct SecView: View {
    var body: some View {
        NavigationView {
             NavigationLink(destination:TerView()) {
                   Text("Secondo")
               }
        }
    }
}
struct TerView: View {
    var body: some View {
        Text("Hello World!")
    }
}
I would like to have only one back button per view.
Here is a screenshot of the problem.

 
     
     
    