TypeError: Cannot read property 'click' of undefined when Map inside Dialog

[BarneyIt]

I need to use GoogleMap inside a Dialog. First time everything is fine, when I close the Dialog and try to reopen I get this message "TypeError: Cannot read property 'click' of undefined" and the Marker doesn't show. Please note that there is no real navigation. Any help will be appreciated. Thanks in advance.
Sample Code to reproduce the problem:

public MainView() {
    GoogleMap gmaps;
    Dialog dialog = null;
    Button btnOpen = new Button("Open Dialog");
    Button btnClose = new Button("Close");
    btnClose.addClickListener(e -> {
        dialog.close();
    });
    
    btnOpen.addClickListener(e -> {
        gmaps = new GoogleMap(apiKey, null, null);
        gmaps.setMapType(GoogleMap.MapType.SATELLITE);
        gmaps.setSizeFull();
        gmaps.setCenter(new LatLon(-31.636036, -60.7055271));
        gmaps.addMarker("Center", new LatLon(-31.636036, -60.7055271), true, "");
        dialog = new Dialog();
        dialog.setSizeFull();
        dialog.add(btnClose, gmaps);
        dialog.open();
    });
    add(btnOpen);
}

[BarneyIt]

The bug is in google-map-marker.js at the line 420 or so.
You have to change this piece of code:

  _clearListener(name) {
    if (this._listeners[name]) {
      google.maps.event.removeListener(this._listeners[name]);
      this._listeners[name] = null;
    }
  },

to this one:

  _clearListener(name) {
    if (this._listeners && this._listeners[name]) {
      google.maps.event.removeListener(this._listeners[name]);
      this._listeners[name] = null;
    }
  },