HarmonyOS setTimeout和setInterval计时器某种特定情况下不工作

import router from '@ohos.router' 
import { hilog } from '@kit.PerformanceAnalysisKit'; 
@Entry 
@Component 
struct SplashPage { 
  @State timer: number = 0 
  @State interval: number = 0 
  aboutToAppear() { 
    this.doSth() 
  } 
  aboutToDisappear(): void { 
    clearTimeout(this.timer) 
    clearInterval(this.interval) 
  } 
  doSth(){ 
    this.interval = setInterval(()=> { 
      hilog.info(0x0000, 'Interval_TAG', '%{public}s', 'setInterval 已执行'); 
    }, 2000) 
    this.timer = setTimeout(()=> { 
      hilog.info(0x0000, 'Timeout_TAG', '%{public}s', 'setTimeout 已执行'); 
      router.replaceUrl({ url: 'pages/MainPageController'}); 
    }, 2000) 
  } 
  build() { 
    Stack() { 
      // 背景 
      Image($r('app.media.splash')) 
        .width('100%') 
        .height('100%') 
        .objectFit(ImageFit.Cover) 
        .hoverEffect(HoverEffect.None) 
    } 
  } 
}