SwiftUI List Bug

struct ContentView: View {
    var body: some View {
        List {
            PosterView()
            
            Section(header: Text("Section")) {
                TestView()
            }
            
            Section(header: Text("Section")) {
                TestView()
            }
            
            Section(header: Text("Section")) {
                TestView()
            }
            
            Section(header: Text("Section")) {
                ForEach(1...20, id: \.self) {_ in
                    Text("test")
                }
            }
        }
            .edgesIgnoringSafeArea(.top)
            .listStyle(GroupedListStyle())
    }
}

struct PosterView: View {
    var body: some View {
        Image(systemName: "tv.fill")
            .resizable()
            .aspectRatio(contentMode: .fit)
            .frame(height: 600)
    }
}

struct TestView: View {
    var body: some View {
        ScrollView(.horizontal) {
            HStack {
                ForEach(1...20, id: \.self) {_ in
                    Image(systemName: "tv.fill")
                        .frame(width: 160, height: 240)
                }
            }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}