ios – SwiftUI’s .contentTransition(.numericText()) not working as anticipated when utilizing .onChange modifier?

I am attempting to implement SwiftUI’s new .contentTransition(.numericText()) as described in this publish. However I can not determine why it really works on a button faucet, however I can not get it to work the place I want, in an .onChange modifier? 🤔

struct ContentView: View {
    @State non-public var newNumberForAnimation = 98.0
    @State non-public var quantity: Double = 99.0
    
    var physique: some View {
        VStack {
        Textual content("(Int(quantity))")
            .font(.system(measurement: 36))
            .contentTransition(.numericText())
            Button {
                         //This works when uncommented
                         //withAnimation {
                             quantity = .random(in: 90 ..< 100)
                         //}
                     } label: {
                         Textual content("Random")
                     }

    }
        //Why does this not work? 
        .onChange(of: quantity, preliminary: true) { oldNumber, newNumber in
            withAnimation {
                newNumberForAnimation = newNumber
            }
        }
     }
}

#Preview {
    ContentView()
}