title: React Native Maps and callout with images
body: <p>I am not able to display <strong>images</strong> (both from the assets and web) in custom marker callout : the image in callout is always shown as a blank rectangle.</p>
  
  <pre><code>class CustomCalloutView extends React.Component {
  
      render() {
          return (
  
              &lt;View&gt;
                  &lt;View&gt;
                      &lt;Text style={{
                          fontWeight: "bold",
                      }}&gt;
                          Test
                  &lt;/Text&gt;
                  &lt;/View&gt;
                  &lt;View&gt;
                      &lt;Image
                          source={{ uri: 'https://facebook.github.io/react/logo-og.png' }}
                          style={{ width: 100, height: 100 }}
                      /&gt;
                  &lt;/View&gt;
              &lt;/View&gt;
  
          )
      }
  }
  </code></pre>
  
  <p>And the main Map component is:</p>
  
  <pre><code>&lt;MapView
      style={{ flex: 1 }}
      initialRegion={{
          latitude: 37.78825,
          longitude: -122.4324,
          latitudeDelta: 0.0922,
          longitudeDelta: 0.0421,
      }}&gt;
      {this.state.markers.map(marker =&gt; (
          &lt;Marker
              key={marker.id}
              coordinate={marker.latlng}&gt;
              &lt;Callout&gt;
                  &lt;CustomCalloutView /&gt;
              &lt;/Callout&gt;
          &lt;/Marker&gt;
      ))}
  &lt;/MapView&gt;);
  </code></pre>
  
  <p>The marker is correctly shown, and the callout renders, but the image is not shown. The same image works if i use it in a normal view.</p>
  
  <p>I am using expo (expo.io) but also tried emulator and installed APK on the device (android; no info about ios).</p>