title: FCM sometimes not receive push notification and sometimes receive push notification on android
body: <p>I have a problem on FCM Android. The push notification is not received sometimes. I already put the code like in Google's tutorial but my apps are not working.</p>
  
  <p>I already put this on <strong>manifest</strong> file</p>
  
  <pre><code>    &lt;service
          android:name=".fcm.MyFcmListenerService"
          android:enabled="true"
          android:exported="false"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="com.google.firebase.MESSAGING_EVENT" /&gt;
          &lt;/intent-filter&gt;
      &lt;/service&gt;
  </code></pre>
  
  <p>and then added this</p>
  
  <pre><code>    &lt;service
          android:name=".fcm.MyInstanceIDListenerService"
          android:enabled="true"
          android:exported="false"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="com.google.firebase.INSTANCE_ID_EVENT"/&gt;
          &lt;/intent-filter&gt;
      &lt;/service&gt;
  </code></pre>