SampleView.swift

import SwiftUI

struct SampleView: View {
    @State private var showOptionsMenu: Bool = false
    var numbers = ["1","2","3","4","5","6","7","8"]
    
    var body: some View {
        ZStack {
            List(self.numbers, id: \.self) { number in
              Text(number)
            }
            
            // Reproduceable also by commenting this out and removing the HalfModalView
            //Text("Hello")
            //    .frame(width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height)
            
            HalfModalView(isShown: $showOptionsMenu) {
                Text("Hello")
            }
        }
        .navigationBarTitle(Text("Nav Title"))
         .navigationBarItems(
            trailing:
                Button(action: {
                    self.showOptionsMenu = true
                }) {
                    Text("Options")
                }
        )
    }
}

struct SampleView_Previews: PreviewProvider {
    static var previews: some View {
        NavigationView {
            SampleView()
        }
    }
}