I have a .navigationDestination that when it opens the view the .task{} runs twice or three times. This is bad for url requests. How do I stop this?

NavigationStack(path: $router.navigationPath) {
            ZStack {
                //....
            }
            .navigationDestination(for: Router.Destination.self) { destination in
                switch destination {
                case .book(let book, let location):
                    BookDetailsView(book: book, location: location)
                case .collection(let collection, let location):
                    CollectionDetailsView(collection: collection, location: location)
                case .topic(let topic, let location):
                    TopicDetailsView(topic: topic, location: location)
                case .author(let author, let location):
                    AuthorDetailsView(author: author, location: location)
                }
            }
        }

A .onAppear{} or a .task{} in any of these views will be called twice and sometimes three times.

Here is some of the other code:

func navigate(to destination: Destination) {
        navigationPath.append(destination)
    }

This is called from a button in another view.

public enum Destination: Hashable {
        case book(_ book: BookViewModel, _ location: Storage.Location)
        case collection(_ collection: CollectionViewModel, _ location: Storage.Location)
        case topic(_ topic: TopicViewModel, _ location: Storage.Location)
        case author(_ author: AuthorViewModel, _ location: Storage.Location)
    }

And this is what is being passed to the navigationStack. The ViewModels are ObservableObjects

Is there any way to stop this?