带有文本输入自动大小写修饰符的SwiftUI Textfield问题

在使用textInputAutocapitalization时，我在应用格式时遇到问题. 当我们取消textInputAutocapitalization 的注释时，它在iOS 17上工作正常，但对于iOS 16，当用户输入超过9个字母并提交时，什么都不会发生.你知道哪里可以发行吗？

这是我的代码

import SwiftUI

struct ContentView: View {
    @FocusState var isFocused: Bool
    let lengh = 9
    @State var text = ""
    var body: some View {
        VStack {
            HStack {
                TextField("write text here...",
                          value: $text,
                          format: .defaultUppercased)
                .focused($isFocused)
                //.textInputAutocapitalization(.characters)
            }
            .border(.black)
        }
        .padding()
        .onChange(of: text) {
            if text.count > lengh {
                text = String($0.prefix(lengh))
            }
        }
    }
}

#Preview {
    ContentView()
}

public struct DefaultUppercasedFormatStyle: ParseableFormatStyle {
    
    public init() {}
    
}

extension DefaultUppercasedFormatStyle {
    
    public var parseStrategy: Self {
        self
    }
    
    public func format(_ value: String) -> String {
        value
    }
    
}

extension DefaultUppercasedFormatStyle: ParseStrategy {
    
    public func parse(_ value: String) -> String {
        value.uppercased()
    }
    
}

extension FormatStyle where Self == DefaultUppercasedFormatStyle {
    
    public static var defaultUppercased: Self {
        Self()
    }
    
}