我有一个Ionic项目，应用打开时可以收到通知，但关闭时通知不来，发送2 - 3次通知后，应用发出关闭警告，关闭时如何收到通知？
离子信息：

Ionic:

   Ionic CLI                     : 6.20.1 (C:\Users\xxxxx\AppData\Roaming\npm\node_modules\@ionic\cli)
   Ionic Framework               : @ionic/angular 6.5.0
   @angular-devkit/build-angular : 13.2.6
   @angular-devkit/schematics    : 13.2.6
   @angular/cli                  : 13.2.6
   @ionic/angular-toolkit        : 6.1.0

Cordova:

   Cordova CLI       : 11.0.0
   Cordova Platforms : android 10.1.2
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 5.0.0, (and 9 other plugins)

Utility:

   cordova-res : 0.15.4
   native-run  : 1.7.1

System:

   NodeJS : v18.13.0 (C:\Program Files\nodejs\node.exe)
   npm    : 9.3.0
   OS     : Windows 10

cordova插件-fcm-with-dependency-已更新7.8.0 " cordova FCM推送插件"
我的代码：

constructor(
    private platform: Platform,
    private splashScreen: SplashScreen,
    private statusBar: StatusBar,
    public route: Router,
    public xDevice: Device,
    private network: Network,
    private fcm:FCM,
  ) {    
    this.initializeApp();
    this.setupFCM();
  }

private async setupFCM() {
    this.platform.ready().then(() => {
      try {
        this.fcm.getInitialPushPayload().then((payload) => {
  
          if(payload?.wasTapped) {
            console.log("Received FCM when app is closed -> ", JSON.stringify(payload));
            // call your function to handle the data
            //this._handlePushNotificationData(payload);
          }                                 
          
        });
        this.fcm.requestPushPermission();
        this.fcm.hasPermission();
        this.fcm.getToken().then(token => {
          console.log("Token: " + token);
          console.log(token)
        }).catch(error => {
          console.log(error)
        })
        this.fcm.onNotification().subscribe(data => {
           if (data.wasTapped) {
             console.log('Received in background');
           } else {
             console.log('Received in foreground');
           }          
        });
        this.fcm.onTokenRefresh().subscribe(token => {
          
          console.log(token)
        });
      } catch (error) {
        console.log(error)
      }
    });
  }

它请求通知权限，但是关闭应用后通知没有来，我也找不到问题，因为应用关闭了，怎么解决这个问题？