Windows Phone Picker

I have a pretty simple picker which works on iOS and Android as expected, but in Windows Phone appears as an empty box (title does not appear like it does on other platforms), and when selected, crashes the view. Is this a bug or am I not doing something correctly?

` var colorDictionary = new Dictionary<string, Color>
{
{ "Blue", Color.Navy},
{ "Green", Color.Green}
};

        var pickerColor = new Picker
        {
            Title = "Please Select",
            HorizontalOptions = LayoutOptions.FillAndExpand
        };

        foreach (string colorName in colorDictionary.Keys)
        {
            pickerColor.Items.Add(colorName);
        }

`