Mapbox-gl-native: Auto-clustering on SymbolLayer cannot be switched off

[teresaholfeld]

I created an example Android app with MapBox, where I have 3 SymbolLayers with GeoJsonSources.
Each layer has a different icon ("NEW", red, and blue marker), and on each layer I add 500 points randomly in the US.
Zooming in and out makes some icons appear/disappear. Apparently, there is some sort of auto-clustering going on.
This is how it looks like when you zoom out a lot:

This is how I initialized the layers:

private void initLayer(String prefix, @DrawableRes int icon) {
    Bitmap bitmap = BitmapFactory.decodeResource(getResources(), icon);
    this.mapboxMap.addImage(prefix + "-marker-image", bitmap);
    SymbolLayer markers = new SymbolLayer(prefix + "-marker-layer", prefix + "-marker-source")
                .withProperties(PropertyFactory.iconImage(prefix + "-marker-image"));
    switch (prefix) {
        case "new":
            this.mapboxMap.addLayer(markers);
            break;
        case "red":
            this.mapboxMap.addLayerBelow(markers, "new-marker-layer");
            break;
        case "blue":
            this.mapboxMap.addLayerBelow(markers, "red-marker-layer");
            break;
    }
    FeatureCollection featureCollection = FeatureCollection.fromFeatures(new ArrayList<Feature>());
    Source geoJsonSource = new GeoJsonSource(prefix + "-marker-source", featureCollection);
    this.mapboxMap.addSource(geoJsonSource);
}

This is what I tried, but what doesn't work:

Source geoJsonSource = new GeoJsonSource(prefix + "-marker-source", featureCollection, 
                new GeoJsonOptions().withCluster(false));

Is there a different way to switch this clustering off?
Is it even intended to be there?

Platform: Android 7.1.1, OnePlus 3T
Mapbox SDK version: 5.1.0

Steps to trigger behavior

1. Add a lot of markers as points to a GeoJsonSource of a SymbolLayer.
2. Zoom in and out.

Expected behavior

All points that I added are visible all the time.

Actual behavior

Only few points are visible when zoomed out.

[jfirebaugh]

By default, symbol layers are tailored for text labeling, where collisions are undesired. To allow symbol collisions, set the iconAllowOverlap and iconIgnorePlacement properties of your layer to true.