HarmonyOS lazyforEach渲染问题

class BasicDataSource implements IDataSource {
  private listeners: DataChangeListener[] = [];
  private originDataArray: NestedString[] = [];

  public totalCount(): number {
    return 0;
  }

  public getData(index: number): NestedString {
    return this.originDataArray[index];
  }

  registerDataChangeListener(listener: DataChangeListener): void {
    if (this.listeners.indexOf(listener) < 0) {
      console.info('add listener');
      this.listeners.push(listener);
    }
  }

  unregisterDataChangeListener(listener: DataChangeListener): void {
    const pos = this.listeners.indexOf(listener);
    if (pos >= 0) {
      console.info('remove listener');
      this.listeners.splice(pos, 1);
    }
  }

  notifyDataReload(): void {
    this.listeners.forEach(listener => {
      listener.onDataReloaded();
    })
  }

  notifyDataAdd(index: number): void {
    this.listeners.forEach(listener => {
      listener.onDataAdd(index);
    })
  }

  notifyDataChange(index: number): void {
    this.listeners.forEach(listener => {
      listener.onDataChange(index);
    })
  }

  notifyDataDelete(index: number): void {
    this.listeners.forEach(listener => {
      listener.onDataDelete(index);
    })
  }

  notifyDataMove(from: number, to: number): void {
    this.listeners.forEach(listener => {
      listener.onDataMove(from, to);
    })
  }
}

class MyDataSource extends BasicDataSource {
  private dataArray: NestedString[] = [];

  public totalCount(): number {
    return this.dataArray.length;
  }

  public getData(index: number): NestedString {
    return this.dataArray[index];
  }

  public addData(index: number, data: NestedString): void {
    this.dataArray.splice(index, 0, data);
    this.notifyDataAdd(index);
  }

  public pushData(data: NestedString): void {
    this.dataArray.push(data);
    this.notifyDataAdd(this.dataArray.length - 1);
  }
}


@Observed
class NestedString {
  message: string;

  constructor(message: string) {
    this.message = message;
  }
}

@Entry
@Component
struct MyComponent {
  private moved: number[] = [];
  @State data: MyDataSource = new MyDataSource();

  aboutToAppear() {
    for (let i = 0; i <= 20; i++) {
      this.data.pushData(new NestedString(`Hello ${i}`));
    }
  }

  build() {
    List({ space: 3 }) {
      LazyForEach(this.data, (item: NestedString, index: number) => {
        ListItem() {
          Row() {
            // 这里的不改变  内侧的改变
            Text(item.message).fontSize(50)
            ChildComponent({ data: item })
          }
        }
        .onClick(() => {
          item.message += '0'
        })
      }, (item: NestedString, index: number) => JSON.stringify(item) + index.toString())
    }.cachedCount(5)
  }
}

@Component
struct ChildComponent {
  @ObjectLink data: NestedString

  build() {
    Row() {
      Text(this.data.message).fontSize(50)
        .onAppear(() => {
          console.info("appear:" + this.data.message)
        })
    }.margin({ left: 10, right: 10 })
  }
}

同层级的ui没有修改，子元素的反而更改了。