The Polyline is not showing in flutter but the directions api is enabled and the current position is not updating

Question

1. The map draw polygons and markers but the polyline is not showing, the code is the following:

GoogleMap(
                onMapCreated: _onMapCreated,
                onCameraMove: _onCameraMove,
                onCameraIdle: _onCameraIdle,
                polygons: getPolygonList(zonesCubit.state.zonesCubit.data!, spotsCubit, zonesCubit) : {},
                polylines: {
                  const Polyline(
                    points: [LatLng(-74.813255, 11.004145), LatLng(-74.81268, 11.003933), LatLng(-74.809933, 11.002921), LatLng(-74.809641, 11.002813)],
                    polylineId: PolylineId("howto"),
                  ),
                },
                markers: Marker(
                          markerId: const MarkerId("CURRENT_USER"),
                          position: currentPosition,
                          icon: carIcon
                ),
                initialCameraPosition:
                    CameraPosition(target: referencePoint, zoom: currentZoom),
              ),

2. the marker position that represents the user current position is not being updated on map, but when re-run the app the marker now is in the new position, but only when re-run the app, the code is the following:

Marker(
                markerId: const MarkerId("CURRENT_USER"),
                position: currentPosition,
                icon: carIcon)

and to detect user position change i´m using geolocator , the code is the following:

 @override
  void initState() {
    super.initState();
    final locationSettings = LocationSettings(accuracy: LocationAccuracy.high, distanceFilter: 5);
    Geolocator.getPositionStream(locationSettings: locationSettings).listen(
            (Position position) {
              setState(() {
                currentPosition = LatLng(position.latitude, position.longitude);
              });
              getit<Logger>().i("current device location: $currentPosition");
          print(position == null ? 'Unknown' : '${position.latitude}, ${position.longitude}');
        }
    );
  }

what could be happening?

I´m expecting draw the polyline and update the marker when the position is being updated