Android Google maps Api doesn't uncluster while zoom in

I created Custom Cluster Render extending DefaultClusterRenderer<T>, while using Google Maps Api and android maps utils. According to the following guide https://github.com/googlemaps/android-maps-utils/blob/master/demo/src/com/google/maps/android/utils/demo/CustomMarkerClusteringDemoActivity.java

When I have more then too many markersin the same area, they cluster into the one. But the don't separate onto markers while zooming, and I can see

http://cs627121.vk.me/v627121202/51eb5/rY9f4p8ivos.jpg

Here's some code:

 public PlaceRender(Context context, GoogleMap map, ClusterManager<MyCluster> clusterManager) {
    super(context, map, clusterManager);
    mIconGenerator = new IconGenerator(context);
    imageView = new ImageView(context);
    mClusterImageView = new ImageView(context);
    mIconGenerator.setContentView(imageView);
    this.context = context;
    this.map = map;
    this.myClusterManager = clusterManager;
}

@Override
protected void onBeforeClusterItemRendered(MyCluster cluster, MarkerOptions markerOptions) {
    super.onBeforeClusterItemRendered(cluster, markerOptions);
    markerOptions.title(cluster.name).snippet(cluster.snippet);
    markerOptions.infoWindowAnchor(0.5f, 0.0f);


}

@Override
protected void onBeforeClusterRendered(Cluster<MyCluster> cluster, MarkerOptions markerOptions) {
    super.onBeforeClusterRendered(cluster, markerOptions);
}

@Override
protected boolean shouldRenderAsCluster(Cluster cluster) {
    // Always render clusters.
    return cluster.getSize() > 1;
}

@Override
protected void onClusterRendered(Cluster<MyCluster> cluster, Marker marker){
    super.onClusterRendered(cluster, marker);
}


@Override
protected void onClusterItemRendered(MyCluster geo, Marker marker) {
    super.onClusterItemRendered(geo, marker);
    loadIconFromApi(geo, marker);
}


public void addItems(List<MyCluster> clusters, Context context, GoogleMap map) {
    myClusterManager = new ClusterManager<>(context, map);
    map.setOnMarkerClickListener(this);

    for (int i = 0; i < clusters.size(); i++) {
        myClusterManager.addItem(clusters.get(i));
        myClusterManager.setRenderer(new PlaceRender(context, map, myClusterManager));

    }
    myClusterManager.cluster();

}

//
private void loadIconFromApi(MyCluster geo, Marker marker) {
    PicassoMarker markers = new PicassoMarker(marker, mIconGenerator, imageView);
    geo.setPicassoMarker(markers);
    Picasso.with(context).load(geo.image).into(markers);
}

@Override
public boolean onMarkerClick(Marker marker) {
    marker.showInfoWindow();
    return true;
}

If I use 15x camera zoom, so I can see every marker, and then zoom out it, my markers won't merge into the one cluster.

What did I missed?

I needed to add this function and call it in onCameraChange

public void updateUI(List<MyCluster> clusters) {
        myClusterManager.clearItems();

        for (int i = 0; i < clusters.size(); i++) {
            myClusterManager.addItem(clusters.get(i));
         //   myClusterManager.setRenderer(new PlaceRender(context, map, myClusterManager));

    }
    myClusterManager.onCameraChange(map.getCameraPosition());
}