SwiftUI crash resizing window macOS

Does anyone know why this crashes, or could anyone tell me how to restructure this code so it doesn't crash. (this is FB11917078)

I have a view which displays two nested rectangles of a given aspect ratio (here 1:1). The inner rectangle is a fixed fraction of the outer rectangle's size.

When embedded in a List, if I rapidly resize the window, the app crashes. If the View is not in a List, there's no crash (and the requested aspect ratio is not respected, which I don't yet know how to fix).

Here's the code for the ContentView.swift file. Everything else is a standard macOS SwiftUI application template code from Xcode 14.2.

import SwiftUI

struct ContentView: View {

    @State var zoomFactor = 1.2 
    var body: some View {
       
    // rapid resizing of the window causes a crash,
    // if the TwoRectanglesView is not embedded in a
    // List, there is no crash
       List {
           ZStack {
               Rectangle()
               TwoRectanglesView(zoomFactor: $zoomFactor)
           }
       }
    }
}


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

struct TwoRectanglesView: View {
    @State private var fullViewWidth: CGFloat?
    @Binding  var zoomFactor: Double
    
    private let aspectRatio = 1.0
    
    var body: some View {
        ZStack {
            Rectangle()
                .aspectRatio(aspectRatio, contentMode: .fit)
            GeometryReader { geo in
                ZStack {
                    Rectangle()
                        .fill(.black)
                        .border(.blue)
                    
                    Rectangle()
                        .fill(.red)
                        .frame(width:geo.size.width/zoomFactor,
                               height: geo.size.height/zoomFactor)
                }
            }
            
        }
    }
}

struct TwoRectanglesView_Previews: PreviewProvider {
    @State static var zoomFactor = 3.1
    static var previews: some View {
        TwoRectanglesView(zoomFactor: $zoomFactor)
    }
}