title: Multiple document gets deleted from firestore collection from the view while deleting one
body: <p>I am subscribed to a collection using the async pipe, however when I go to delete a document inside the collection, any document below the deleted document also gets removed from the UX and but when i reload the component, i get that document again from firestore.</p>
  
  <p>This is the code i am using to fetch guide collection</p>
  
  <pre><code>getGuides() {
  return this.db.collection('guides').snapshotChanges()
    .map(data =&gt; {
      return data.map(a =&gt; {
  
        let id = a.payload.doc.id;
        let data = a.payload.doc.data();
        return { id, ...data };
      })
    })
  }
  </code></pre>
  
  <p>And this code is to delete the document with it's id</p>
  
  <pre><code>deleteGuide(id) {
       return this.db.doc('guides/' + id).delete();
  }
  </code></pre>
  
  <p>Thanks!</p>
  
  <p>gif with problem</p>
  
  <p><a href="https://i.stack.imgur.com/Gyhns.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Gyhns.gif" alt="enter image description here"></a></p>