Styles do not work with pg_tileserv vector tiles

The style added with applyStyle does not work with MVT tiles provided by pg_tileserv. Regular Style object works just fine and the same style works with a GeoJSON source.

Below is a snippet that describes the problem with points (also tested with polygons):

const style = {
      version: 8,
      name: 'test',
      metadata: {
        'maputnik:renderer': 'mbgljs'
      },
      sources: {
        populated: {
          type: 'vector'
        }
      },
      sprite: '',
      glyphs: '',
      layers: [
        {
          id: 'asd',
          type: 'circle',
          source: 'populated',
          paint: {
            'circle-color': 'rgb(42,137,134)',
            'circle-stroke-color': 'rgba(129, 40, 40, 1)',
            'circle-radius': 10
          }
        },
      ],
      id: '4yrnz1air'
    };

const style2 = new Style({
    image: new CircleStyle({
      radius: 10,
      fill: new Fill({
        color: 'rgb(42,137,134)',
      }),
    }),
  })

const layerGeojson = new VectorLayer({
  declutter: true,
  source: new VectorSource({
    format: new GeoJsonFormat(),
    url: 'https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_50m_populated_places.geojson'
  })
});

const layerVt = new VectorTileLayer({
  source: new VectorTileSource({
     format: new MVT(),
     url: 'http://localhost:7800/public.test_layer/{z}/{x}/{y}.pbf' // Point layer
   }),
  style: style2
});

// Works
// map.addLayer(layerVt);

// Does not work 
applyStyle(layerVt, style, ['asd']).then(() => map.addLayer(layerVt));

// Works
applyStyle(layerGeojson, style, ['asd']).then(() => map.addLayer(layerGeojson));

I am using ol-mapbox-style==6.1.2 and ol==6.3.1.

[ahocevar]

@Joonalai Your layer definition is missing a source-layer property. That property has to match the layer from the vector tile, because vector tiles can contain several layers. I updated your codesandbox with the following layer property:

      "source-layer": "public.osm_lodging_p",

[Joonalai]

Wow, thank you so much!!