HarmonyOS 层叠布局点击事件实现问题

参考代码：

@Component
export struct CountDownComponent {
  @Prop count: number = 0;
  costOfOneAttempt: number = 1;
  @State countDownStartValue: number = 20;
  @State son: HitTestMode = HitTestMode.None
  build() {
    Column() {
      Text(this.countDownStartValue + '')
      // @Prop装饰的变量不会同步给父组件
      Button(`Try again`)
    }
    .hitTestBehavior(this.son)
    .height(300)
    .width(300)
    .backgroundColor('gray')
    .onClick(() => {
      console.log('111111111111')
    })
  }
}
@Entry
@Component
struct ParentComponent {
  @State countDownStartValue: number = 10;
  build() {
    Stack() {
      Column() {
        CountDownComponent({ count: this.countDownStartValue, costOfOneAttempt: 2 })
      }
    }
    .zIndex(999)
    .width(310)
    .height(310)
    .backgroundColor("red")
    .onClick(() => {
      console.log('1111111111112222222222')
    })
  }
}
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参考链接：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-universal-attributes-hit-test-behavior-V5