SwiftUI: dismissing `ActionSheet` dismisses its parent view

I have a view FooView in a navigation stack presented via a NavigationLink.

And FooView has a button that triggers a ActionSheet.

The problem is: when the ActionSheet is dismissed (either cancelled or selected option), its parent view, i.e. FooView is also dismissed, i.e. pops up from the navigation stack.

Is there a way to prevent it doing that?

More importantly, why is this happening? What dismissed FooView?

iOS version: iOS 15 on iPhone

XCode: 14.2

Here is a minimum reproducible sample code.

I noticed that if I moved NavigationView from outside of TabView into ContentView, then the issue is gone. But then the Tabs will show up even in FooView, hence I kept NavigationView outside TabView. (And why does that matter?)

import SwiftUI

@main
struct ViewDismissApp: App {
    var body: some Scene {
        WindowGroup {
            NavigationView {
                TabView {
                    ContentView(title: "Tab 1")
                        .tabItem {
                            Label("Tab1", systemImage: "wifi")
                        }
                    ContentView(title: "Tab 2")
                        .tabItem {
                            Label("Tab2", systemImage: "wrench.adjustable")
                        }
                }
            }
            .navigationViewStyle(.stack)
        }
    }
}


struct ContentView: View {
    let title: String

    var body: some View {
        VStack {
            NavigationLink {
                FooView()
            } label: {
                Text(title)
            }
        }
    }
}

struct FooView: View {
    @State private var showActions = false

    var body: some View {
        VStack {
            Text("Foo View")
            
            actionButton()
        }
    }
    
    private func actionButton() -> some View {
        Button(action: {
            showActions = true
        }) {
            Image(systemName: "arrow.up.circle")
        }
        .actionSheet(isPresented: $showActions) {
            ActionSheet(title: Text("Actions"),
                        message: nil,
                        buttons: [
                            .default(Text("Option 1")) {
                                // TODO
                            },
                            .default(Text("Option 2")) {
                                // TODO
                            },
                            .cancel()
                        ])
        }
    }
}

Thanks!