Do not increase ol.style.IconImageCache cache size, default is fine

 map.js

@@ -911,8 +911,6 @@
        vehicles_last_update[type] = 0;
    });
    
    ol.style.IconImageCache.shared.setSize(512);
	
    geolocation_feature = new ol.Feature({
        name: '',
        style: new ol.style.Style({