Harmony OS ets @StorageProp和@Watch修饰同一个变量问题

@Entry
@Component
export struct TestView {
  @StorageProp('isHorizontal') @Watch("onChanged") horizontal: boolean = this.getHorizontal();
  @State flexDirection: FlexDirection = this.horizontal ? FlexDirection.Row : FlexDirection.Column;

  onChanged() {
    console.log('receive watch event')
  }

  public getHorizontal(): boolean {
    if (AppStorage.Get('isHorizontal') == null) {
      AppStorage.SetOrCreate('isHorizontal', false);
    }
    return AppStorage.Get('isHorizontal');
  }

  public setHorizontal(state: boolean): void {
    AppStorage.SetOrCreate('isHorizontal', state);
    return ;
  }

  build() {
    Flex({
      direction: this.flexDirection
    }) {
      Row() {
        Button('TEST').onClick(() => {
          console.log('horizontal ' + `${this.horizontal}` + ' change to ' + `${!this.horizontal}`)
          this.setHorizontal(!this.horizontal);
          console.log('after change = ' + `${this.horizontal}`)
        })
      }
      .width('100%')
      .height('100%')
    }
    .height('100%')
  }
}