FB9013209: SwiftUI: Preview and actual layout differ in this example. (SwiftUI Bug)

ContentView.swift

//
//  ContentView.swift
//  Shared
//
//  Created by Peter Steinberger on 20.02.21.
//

import SwiftUI

struct SettingsGroup<Content: View>: View {

    let title: String
    let content: () -> Content

    init(title: String, content: @escaping () -> Content) {
        self.title = title
        self.content = content
    }

    var body: some View {
        HStack {
            VStack {
                HStack {
                    Text(title)
                        .background(Color.green)
                }
                Spacer()
            }
            .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .trailing)
            .background(Color.yellow)

            VStack {
                HStack {
                    content()
                }
                .background(Color.blue)
                Spacer()
            }
            .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
            .background(Color.red)
        }
    }
}

struct ContentView: View {
    var body: some View {
        VStack {

            Text("Large Content")
                .frame(minHeight: 100)

            SettingsGroup(title: "Highlight :") {
                VStack(alignment: .leading) {
                    Text("Checkbox 111")
                    Text("Checkbox 2")
                }
            }

            SettingsGroup(title: "Highlight :") {
                VStack(alignment: .leading) {
                    Text("Checkbox 111")
                    Text("Checkbox 2")
                }
            }

            SettingsGroup(title: "Highlight :") {
                VStack(alignment: .leading) {
                    Text("Checkbox 111")
                    Text("Checkbox 2")
                }
            }

            Text("Large Content")
                .frame(minHeight: 500)
        }
    }
}

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