title: Please report: Excessive number of pending callbacks: 2941
body: <p>I have this error "Please report: Excessive number of pending callbacks: 2941. Some pending callbacks that might have leaked by never being called from native code: ". It's because i try to read like 1400 documents in firestore. I do something like this:</p>
  
  <pre><code>array.map(userUid =&gt; {
          var docRef = db.collection('users').doc(userUid);
          docRef.get().then(doc =&gt; {
            ...
          })
  })
  </code></pre>
  
  <p>Here array is an array with 1400 users's uid. I don't know how to handle this error, do you have any idea ?</p>
  
  <p>Infos:</p>
  
  <ul>
  <li>react native: 0.61.1</li>
  <li>react-native-firebase: 6.4.0</li>
  <li>Bug on IOS simulator didn't try on Android.</li>
  </ul>