Xamarin.Forms.Labs - Checkboxes in ListView not working on Windows Phone 8?

I want to display a list of checkboxes (using a control from Xamarin.Forms.Labs libriary) inside a Xamarin.Forms app. I followed the Xamarin.Forms.Labs wiki to initialize the application correctly.

It works fine on Android, however when I try to use it on Windows Phone 8 emulator the checkboxes don't change their state when clicked / listened.

I have XAML:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
                       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
                       xmlns:controls="clr-namespace:Xamarin.Forms.Labs.Controls;assembly=Xamarin.Forms.Labs"
                       x:Class="App4.CheckBoxPage">
  <StackLayout>
    <ListView x:Name="listView">
      <ListView.ItemTemplate>
        <DataTemplate>
          <ViewCell>
            <ViewCell.View>
              <controls:CheckBox DefaultText="{Binding}" HorizontalOptions="FillAndExpand" TextColor="White" FontSize="25" />
            </ViewCell.View>
          </ViewCell>
        </DataTemplate>
      </ListView.ItemTemplate>
    </ListView>
  </StackLayout>
</ContentPage>

      

        
        
        
      

    

... and the simple code behind:

using System;
using System.Linq;

using Xamarin.Forms;

namespace App4
{    
    public partial class CheckBoxPage : ContentPage
    {    
        public CheckBoxPage ()
        {
            InitializeComponent ();
            listView.ItemsSource = Enum.GetValues(typeof(DayOfWeek)).OfType<DayOfWeek>().Select(c => c.ToString());
        }
    }

    public class App
    {
        public static Page GetMainPage()
        {
            return new CheckBoxPage();            
        }
    }
}

      

        
        
        
      

    

Any ideas for working with checkboxes?