HarmonyOS 鸿蒙Next路由跳转2次后emitter.on监听失效

使用Navigation + 系统路由表方式进行路由跳转，多次跳转返回后没有出现失效问题，测试代码如下：

页面A代码：

import { ToastUtil } from '@pura/harmony-utils';
import { NavUtil } from '../../../../common/NavUtil';
import { emitterSend, emitterSub } from '../../../../common/util/EmitterUtil';

@Entry
@Component
struct NavPage {
  @State message: string = 'NavPage';

  aboutToAppear(): void {
    emitterSub(1, () => {
      ToastUtil.showToast("触发event1")
    })
  }

  build() {
    Navigation(NavUtil.pageInfos) {
      Text(this.message)
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
      Button("event1事件触发")
        .onClick(() => {
          emitterSend(1, "1234")
        })
      Button("跳转PageOne")
        .onClick(() => {
          NavUtil.pageInfos.pushPath({
            name: "PageOne"
          })
        })
    }
    .hideTitleBar(true)
    .hideBackButton(true)
    .hideToolBar(true)
  }
}

页面B代码

import { NavUtil } from '../../../../../common/NavUtil';
import { emitterSend } from '../../../../../common/util/EmitterUtil';

@Component
struct PageOne {
  @State message: string = 'PageOne';

  build() {
    NavDestination() {
      Text(this.message)
        .id('NavPageHelloWorld')
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
      Button("event1事件触发")
        .onClick(() => {
          emitterSend(1, "1234")
        })
    }
    .onBackPressed(() => {
      NavUtil.pageInfos.pop() // 弹出路由栈栈顶元素
      return true
    })
  }
}

@Builder
export function PageOneBuilder() {
  PageOne()
}

EmitterUtil

import emitter from '@ohos.events.emitter';
import { Callback } from '@ohos.base';

export function emitterSub(eventId: number, eventCallback: Callback<emitter.EventData>) {
  let event: emitter.InnerEvent = {
    eventId: eventId
  }
  emitter.on(event, eventCallback)
}

export function emitterSend(eventId: number, eventParam: string) {
  let event: emitter.InnerEvent = {
    eventId: eventId
  }

  let eventData: emitter.EventData = {
    data: {
      param: eventParam
    }
  };
  emitter.emit(event, eventData)
}

NavUtil

export class NavUtil {
  static pageInfos: NavPathStack = new NavPathStack()
}