Google map API zoom plus, minus, tilt map and full screen icons are broken

I have implemented google-map in my Angular project with below settings:

this.options = {
      center: { lat: this.filters.locationLat, lng: this.filters.locationLong },
      zoom: 8,
      zoomControl: true,
      fullscreenControl: true,
      disableDefaultUI: false,
      clickableIcons: true,
      draggable: false,
      mapTypeControl: false,
      streetViewControl: false,
      tilt: 0,
      keyboardShortcuts: false,
      maxZoom: 18,
    };

<google-map (mapInitialized)="onMapReady($event)" [options]="options">
  <map-marker-clusterer> </map-marker-clusterer>
</google-map>

But somehow it is breaking the zoom plus, minus, tilt map and full screen icons as below:

Note: I am not getting any error on my console regarding Google map.