SwiftUI onAppear bug

OnAppearCheck.swift

//
//  ContentView.swift
//  OnAppearCheck
//
//  Created by VAndrJ on 21.12.2023.
//

import SwiftUI

struct ContentView: View {
    @State var isLoggedIn: Bool = false

    var body: some View {
        if isLoggedIn {
            TabView {
                TabViewView(title: "Store", tabIcon: "trash", isLoggedIn: $isLoggedIn)
                TabViewView(title: "New", tabIcon: "newspaper", isLoggedIn: $isLoggedIn)
                TabViewView(title: "Gallery", tabIcon: "photo", isLoggedIn: $isLoggedIn)
                TabViewView(title: "Discover", tabIcon: "magnifyingglass", isLoggedIn: $isLoggedIn)
                TabViewView(title: "Profile", tabIcon: "person", isLoggedIn: $isLoggedIn)
            }
        } else {
            LoginView {
                isLoggedIn = true
            }
        }
    }
}

struct TabViewView: View {
    let title: String
    let tabIcon: String
    @Binding var isLoggedIn: Bool

    var body: some View {
        NavigationStack {
            Text(title)
                .navigationBarTitle(title)
                .task {
                    print("🏋️ \(title) some task")
                }
                .onAppear {
                    print("👋 \(title) onAppear")
                }
                .onDisappear {
                    print("😶‍🌫️ \(title) onDisappear")
                }
                .toolbar {
                    ToolbarItem(placement: .navigationBarTrailing) {
                        Button("Logout") {
                            isLoggedIn = false
                        }
                    }
                }
        }
        .task {
            print("🏋️ \(title) NavigationStack some task")
        }
        .onAppear {
            print("👋 \(title) NavigationStack onAppear")
        }
        .onDisappear {
            print("😶‍🌫️ \(title) NavigationStack onDisappear")
        }
        .tabItem {
            Image(systemName: tabIcon)
            Text(title)
        }
    }
}

struct LoginView: View {
    let onLogin: () -> Void

    var body: some View {
        Button("Login", action: onLogin)
    }
}

OnAppearCheck1.swift

//
//  ContentView.swift
//  OnAppearCheck
//
//  Created by VAndrJ on 21.12.2023.
//

import SwiftUI

struct ContentView: View {
    @State var isLoggedIn: Bool = false

    var body: some View {
        if isLoggedIn {
            TabView {
                TabViewView(title: "Store", tabIcon: "trash")
                TabViewView(title: "New", tabIcon: "newspaper")
                TabViewView(title: "Gallery", tabIcon: "photo")
                TabViewView(title: "Discover", tabIcon: "magnifyingglass")
                TabViewView(title: "Profile", tabIcon: "person")
            }
            .environment(\.logout, LogoutAction(action: logout))
        } else {
            LoginView {
                isLoggedIn = true
            }
        }
    }

    func logout() {
        isLoggedIn = false
    }
}

struct LogoutAction {
    let action: () -> Void

    func callAsFunction() {
        action()
    }
}

struct LogoutActionKey: EnvironmentKey {
    static var defaultValue: LogoutAction? = nil
}

extension EnvironmentValues {
    var logout: LogoutAction? {
        get { self[LogoutActionKey.self] }
        set { self[LogoutActionKey.self] = newValue }
    }
}

struct TabViewView: View {
    let title: String
    let tabIcon: String
    @Environment(\.logout) var logout

    var body: some View {
        NavigationStack {
            Text(title)
                .navigationBarTitle(title)
                .task {
                    print("🏋️ \(title) some task")
                }
                .onAppear {
                    print("👋 \(title) onAppear")
                }
                .onDisappear {
                    print("😶‍🌫️ \(title) onDisappear")
                }
                .toolbar {
                    ToolbarItem(placement: .navigationBarTrailing) {
                        Button("Logout") {
                            logout?()
                        }
                    }
                }
        }
        .task {
            print("🏋️ \(title) NavigationStack some task")
        }
        .onAppear {
            print("👋 \(title) NavigationStack onAppear")
        }
        .onDisappear {
            print("😶‍🌫️ \(title) NavigationStack onDisappear")
        }
        .tabItem {
            Image(systemName: tabIcon)
            Text(title)
        }
    }
}

struct LoginView: View {
    let onLogin: () -> Void

    var body: some View {
        Button("Login", action: onLogin)
    }
}

@hmlongco , only this workaround helps:

public extension View {

    func onDidAppear(perform action: @escaping () -> Void) -> some View {
        background(DidAppearView(action: action))
    }
}

struct DidAppearView: UIViewControllerRepresentable {
    class Coordinator: ActionControllerRepresentableDelegate {
        var action: () -> Void

        init(action: @escaping () -> Void) {
            self.action = action
        }

        func performAction() {
            action()
        }
    }

    let action: () -> Void

    func makeUIViewController(context: Context) -> DidAppearViewController {
        let controller = DidAppearViewController()
        controller.delegate = context.coordinator

        return controller
    }

    func updateUIViewController(_ controller: DidAppearViewController, context: Context) {
    }

    func makeCoordinator() -> Coordinator {
        Coordinator(action: action)
    }
}

protocol ActionControllerRepresentableDelegate: AnyObject {
    func performAction()
}

class DidAppearViewController: UIViewController {
    weak var delegate: ActionControllerRepresentableDelegate?

    override func viewDidAppear(_ animated: Bool) {
        delegate?.performAction()
    }
}