TorbenK/TK.CustomMap Xamarin Forms PIN not showing - xamarin.forms

Question

Did anyone experience the following issue?
The pin is nowhere to be found. there are very few samples out there and I can't find one that helps me resolve this issue.
Literally, I copied and pasted the snippet from the project sample from TK.CustomMap github
Image with working pin from the original project
Now, on mine, same snippet. code below
The pin is working because it clearly shows all the properties I added to it, such as the title. I know this by debugging. but is not getting into the view. so I believe. I have issues with the binding.
ViewModel
/// <summary>
/// Pins bound to the <see cref="TKCustomMap"/>
/// </summary>
public ObservableCollection<TKCustomMapPin> Pins
{
get { return _pins; }
set
{
if (_pins != value)
{
_pins = value;
OnPropertyChanged("Pins");
}
}
}
MapSpan _mapRegion = MapSpan.FromCenterAndRadius(new Position(37.787332, -122.410540), Distance.FromKilometers(2));
Position _mapCenter;
ObservableCollection<TKCustomMapPin> _pins;
constructor
_mapCenter = new Position(37.787332, -122.410540);
_pins = new ObservableCollection<TKCustomMapPin>();
CenterMap();
void CenterMap()
{
var stopOne = new Position(26.0769102268052, -80.2535091197863);
var pin = new TKCustomMapPin
{
Position = stopOne,
ShowCallout = true,
IsDraggable = true,
DefaultPinColor = Color.GreenYellow
};
_pins.Add(pin);
}
XAML
<tk:TKCustomMap
x:Name="mapView"
IsRegionChangeAnimated ="true"
HasZoomEnabled="True"
MapType="Satellite"
WidthRequest="500"
HeightRequest="800"
IsShowingUser="true"
IsClusteringEnabled="true"
MapRegion="{Binding MapRegion}"
Polygons="{Binding Polygons}"
CalloutClickedCommand ="{Binding CalloutClickedCommand}"
Routes="{Binding Routes}"
Pins="{Binding Pins}"/>