cornerRadius or shadow on VStack killing Picker

Hi,

I have a very strange problem. On my View I have 2 Picker and a Button embedded in a VStack. I can format the VStack and the Picker are working properly. As soon as I add a cornerRadius or a shadow to the VStack the Pickers are shown but nothing can be changed any more.

Is this a known problem and are there any workarounds?

Here is my code:

struct TestView: View {
    @State private var someSelection1 = 1
    @State private var someSelection2 = 1
    
    var body: some View {
        Group {
            VStack {
                Picker(selection: $someSelection1, label: Text("Demo 1")) {
                    Text("Option 1").tag(1)
                    Text("Option 2").tag(2)
                    Text("Option 3").tag(3)
                }
                .pickerStyle(SegmentedPickerStyle())
                
                Picker(selection: $someSelection2, label: Text("Demo 2")) {
                    Text("Sub 1").tag(1)
                    Text("Sub 2").tag(2)
                    Text("Sub 3").tag(3)
                    Text("Sub 4").tag(4)
                }
                .pickerStyle(SegmentedPickerStyle())
                
                Spacer()
                Button(action: { print("Start button pressed")}) {
                    Text("Start")
                        .frame(minWidth: 0, maxWidth: .infinity, minHeight: 20, maxHeight: 40)
                        .foregroundColor(Color.white)
                        .font(.custom("Rubik-Bold", size: 22))
                }
                .background(Color.blue)
// comment line 32 and 33 and the issue is gone
                .cornerRadius(10)
                .shadow(radius: 10)
            }
            .padding(.top, 40)
            .padding(10)
            .background(Color("Background"))
            .cornerRadius(20)
            .shadow(radius: 10)
        }
        .padding(.top, 180)
        .padding(.leading, 20)
        .padding(.trailing, 20)
        .padding(.bottom, 10)
        .background(Color("Background"))
    }
}

struct TestView_Previews: PreviewProvider {
    static var previews: some View {
        TestView()
    }
}

Thanks for your help

Erik