SwiftUI: Presenting multiple sheets from within a VStack

I am trying to present a sheet from an item in a VStack. The following code works on iOS 13.7 but not on iOS 14:

Code Block swift
import SwiftUI
struct ListRow: View {
    @State var showingSheet: Bool = false
    var body: some View {
        Button(action: {
            self.showingSheet = true
        }) {
            Text("Tap me")
        }.sheet(isPresented: self.$showingSheet, content: {
            NavigationView {
                Text("Hello")
            }
        })
    }
}
struct ListRow_Previews: PreviewProvider {
    static var previews: some View {
        ListRow()
    }
}
struct ContentView: View {
    @State private var showingModal: Bool = false
    var body: some View {
        NavigationView{
            VStack {
                ForEach (0..<10) {_ in
                    ListRow().padding()
                }
            }.navigationBarItems(leading: Button(action: {
                self.showingModal = true
            }, label: {
                Text("TAP")
            })).sheet(isPresented: self.$showingModal, content: {
                Text("Testing main modal")
            })
            
        }
    }
}
struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

I works when I change he view from a VStack to a List, however that is not possible in my current actual application due to other features.

Is the fact that this doesn't work on iOS 14 (even without a recompile) just a bug? Or is it intentional behaviour?

Thank you

Tobias Timpe