Preference tried to update multiple times (SwiftUI)

Using Swift
,
6

Sorry for not including the code

I simplified the example and every time I managed to reproduce the "Bound preference tried to update multiple times..." in diff conditions

Preference case 1 video
Preference case 2 video
Preference case 3 video
Preference case 4 video

import SwiftUI

struct ContentView: View {
    
    @State var width: CGFloat? = nil
    @State var myText : String = "Text"
    
    var body: some View {
        VStack{
        TextField("Mytext", text: $myText)
        Spacer()
        Text("\(myText)")
                .background(
                    GeometryReader{ proxy in
                        Color.clear.preference(key: WidthKey.self, value: proxy.size.width)
                    }
                )
            .fixedSize()
            .frame(width: 200, height: 200)
            .onPreferenceChange(WidthKey.self){self.width = $0 }
        }
    }
}

struct WidthKey: PreferenceKey {
    static var defaultValue: CGFloat? = nil
    static func reduce(value: inout CGFloat?, nextValue: () -> CGFloat?) {
        value = value ?? nextValue()
    }
}

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