HarmonyOS 鸿蒙Next 父组件数据更新后，父组件的@Builder也已更新，但是子组件的@BuilderParam不更新

HarmonyOS 鸿蒙Next 父组件数据更新后，父组件的@Builder也已更新，但是子组件的@BuilderParam不更新

我的需求是子组件content用到父组件的插槽，当父组件数据更新时，子组件的content也要更新。 如下示例中，父组件数据和@Builder ContentView都已经更新了的，我希望把父组件的ContentView当成子组件的插槽传递。但是子组件不会更新。

import text from '@ohos.graphics.text';

interface GeneratedObjectLiteralInterface_1 {
  name: string;
  age: string;
}

[@Observed](/user/Observed)
class Tmp {
  text: string = "Hello"
}
[@Builder](/user/Builder) function customBuilder($$: Tmp) {
  Column() {
    Text($$.text)
      .fontSize(50)
  }
}

[@Entry](/user/Entry)
[@Component](/user/Component)
struct Parent {
  [@State](/user/State) detail: GeneratedObjectLiteralInterface_1 = {
    name: "盖伦",
    age: '18'
  }

  [@Builder](/user/Builder) ContentView($$: Tmp){
    Text($$.text)
  }


  build() {
    Column(){
      Text("父组件").fontColor("red").onClick(() => {
        this.detail = {
          name: Math.random().toString(36).slice(2,10),
          age: (Math.random()*20 + 10).toFixed(0)
        }
        console.log('1:',JSON.stringify(this.detail));
      })
      this.ContentView({text: this.detail.name})
      this.ContentView({text: this.detail.age})
      Child({
        title: "姓名",
        content: (): void => this.ContentView({text: this.detail.name})
      })
      Child({
        title: "年龄",
        content: (): void => this.ContentView({text: this.detail.age})
      })
    }.width("100%").backgroundColor('#eee')
  }
}

@Component struct  Child {

  @Prop title: string

  @BuilderParam content:()=>void = this.handleContent
  [@Builder](/user/Builder) handleContent() {
    Text("原始handleContent")
  }
  build() {
    Row(){
      Text("子组件-")
      Text(this.title+"=")
      this.content()
    }.backgroundColor('#999').margin(15)
  }
}
 

如果ContentView换一种写法，又是可以实现子组件也更新的，但是我不想这么做，因为本身抽离就是为了公共模块，会有太多if了

[@Builder](/user/Builder) ContentView($$: string){
    if($$==="name"){
        Text(this.detail.name)
    }else if($$==='age'){...}
  }
  <!--父元素调用-->
  Child({
        title: "姓名",
        content: (): void => this.ContentView("age")
      })
 

而如果把根据官网ContentView抽离到外层，又会报错Cannot read property observeComponentCreation2 of undefined

请各路大神指教指教。，感谢！！