TabView within NavigationStack not behaving properly

I have a TabView within a NavigationStack, and the child views of the TabView contain NavigationLinks and NavigationDestinations. The issue I'm running into is, when tab 1 is the starting view of the TabView, only the NavigationDestinations on tab 1 work. If I start with the TabView displaying tab 2 or 3, the NavigationDestinations on Tabs 1, 2, and 3 all work properly.

When starting on tab 1, the error I receive when tapping the NavigationLink on Tab 2 (when it doesn't work) is "A NavigationLink is presenting a value of type “Int” but there is no matching navigation destination visible from the location of the link. The link cannot be activated."

I don't think there's anything wrong with the actual NavigationLinks or NavigationDestinations themselves, since it works when launching on tabs 2 or 3, but I cannot for the life of me figure out why starting at tab 1 doesn't work.

struct MainView: View {

    @State private var selectedView: Int = 1
    @Binding var taskList: [ToDoTask]
    @Binding var projectList: [Project]
    @EnvironmentObject var projectStore: Project.projectList
    @Environment(\.scenePhase) private var scenePhase
    @State private var navPath = NavigationPath()
    

    var body: some View {
        NavigationStack(path: $navPath) {
            TabView(selection: $selectedView) {
                NavigationView {
                    ContentView(taskList: $taskList, projectList: $projectList)
                }
                .tabItem { Label("Focus", systemImage: "star.fill")
                }
                .tag(1)

                NavigationView {
                    ProcessView(taskList: $taskList, projectList: $projectList)
                }
                .tabItem { Label("Refocus", systemImage: "arrow.left.arrow.right") }
                .tag(2)

                NavigationView {
                    ReorganizationView(projectList: $projectList, taskList: $taskList)
                }
                .tabItem { Label("Reorganize", systemImage: "exclamationmark.3") }
                .tag(3)
            }
            .accentColor(Color("ListColor"))
            .onChange(of: scenePhase) { phase in
                if phase == .background {
                    FileSaveLoad.saveTasks(tasks: taskList) { result in
                        if case .failure(let error) = result {
                            fatalError(String("\(error)"))
                        }
                    }
                    FileSaveLoad.saveProjects(projects: projectList) { result in
                        if case .failure(let error) = result {
                            fatalError(String("\(error)"))
                        }
                    }
                }
            }
        }
    }
}