MarkerOptions.anchor doesn't affect on position

[Almaz]

package.json:

...
    "@ionic-native/core": "^5.0.0",
    "@ionic-native/device": "^5.21.6",
    "@ionic-native/google-maps": "^5.27.0-beta-20200630",
    "@ionic/angular": "^5.0.4",
    "cordova-browser": "6.0.0"
...

using cordova browser.

this.map.addMarker({
          position: {lat: this.lat, lng: this.lon},
          icon: {
            url: '../../assets/icon/eye.png',

            size: {
              width: 32,
              height: 32
            }
          },
          anchor: [16, 16]
        })

the marker appears at the same place in any anchor