HarmonyOS TextInput焦点在弹窗第一次打开时不起作用

import promptAction from '@ohos.promptAction'  
let customDialogId: number = 0  
@Builder  
function customDialogBuilder() {  
  Column() {  
    TextInput({ placeholder: 'input your username' }).margin(20)  
      .focusable(true)  
      .focusOnTouch(true)  
      .defaultFocus(true)  
      .enableKeyboardOnFocus(true)  
    Row() {  
      Button("确认").onClick(() => {  
        promptAction.closeCustomDialog(customDialogId)  
      })  
      Blank().width(50)  
      Button("取消").onClick(() => {  
        promptAction.closeCustomDialog(customDialogId)  
      })  
    }  
  }.height(200).padding(5)  
}  
@Entry  
@Component  
struct Index {  
  @State message: string = '评论'  
  build() {  
    Row() {  
      Column() {  
        Text(this.message)  
          .fontSize(50)  
          .fontWeight(FontWeight.Bold)  
          .onClick(() => {  
            promptAction.openCustomDialog({  
              builder: customDialogBuilder.bind(this)  
            }).then((dialogId: number) => {  
              customDialogId = dialogId  
            })  
          })  
        //普通TextInput  
        TextInput({ placeholder: 'input your username' }).margin(20)  
          .focusable(true)  
          .focusOnTouch(true)  
          .defaultFocus(true)  
          .enableKeyboardOnFocus(true)  
      }  
      .width('100%')  
    }  
    .height('100%')  
  }  
}