Troubles using Xamarin.Forms with Prism.Forms and AutoFac

Hi there,

I'm fighting with a problem in combination with Xamarin.Forms, Prism.Forms and AutoFac.
I have a ContentPage with a Syncfusion.NavigationDrawer on it. The menu items are switching ContentViews for the different menu items.

XAML stuff:

<navigationdrawer:SfNavigationDrawer.ContentView>
    <Grid BackgroundColor="White">
        <Grid.RowDefinitions>
            <RowDefinition Height="auto"/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <StackLayout BackgroundColor="#1aa1d6" Orientation="Horizontal">
            <Button Image="threelines.png" HeightRequest="50" WidthRequest="50" HorizontalOptions="Start" BackgroundColor="#1aa1d6" Clicked="HamburgerClicked"/>
        </StackLayout>
        <ContentView Grid.Row="1" Content="{Binding ViewContent}"/>
    </Grid>
</navigationdrawer:SfNavigationDrawer.ContentView>

C# stuff:

public MainPageViewModel(INavigationService navigationService, IDataService dataService)
    : base(navigationService)
{
    this.dataService = dataService;
    this.NavigationItemTapped = new DelegateCommand<NavigationItem>(this.NavItemTapped);
    this.NavigationItems = new ObservableCollection<NavigationItem>
    {
        new NavigationItem() { Text = AppResource.Dashboard, ViewType = typeof(DashboardView) },
        new NavigationItem() { Text = AppResource.Canteens, ViewType = typeof(CanteenBrowserView) },
        new NavigationItem() { Text = AppResource.Profile, ViewType = typeof(ProfileView) }
    };
}

private void ActivateView(NavigationItem item)
{
    this.ViewContent = (ContentView)Activator.CreateInstance(item.ViewType);
    this.Title = item.Text;
}

private void NavItemTapped(NavigationItem item)
{
    ActivateView(item);
}

I'm autowiring separate ViewModels to the ContentViews using prism:ViewModelLocator.AutowireViewModel="True".
To get that working I registered the ViewModels using the ContainerBuilder. Each ViewModel derives from a base class holding a property for
IComponentContext. I use that property to resolve services in the ViewModels (e.g. a DataService)

protected override void RegisterTypes(IContainerRegistry containerRegistry)
{
    var builder = containerRegistry.GetBuilder();
    if (this.Mocking)
    {
        builder.RegisterType<MockDataService>().As<IDataService>().SingleInstance();
    }
    else
    {
        builder.RegisterType<DataService>().As<IDataService>().SingleInstance();
    }
    builder.RegisterType<Configuration>().As<IConfiguration>().SingleInstance();
    builder.Register(c => new DashboardViewModel() { ComponentContext = c.Resolve<IComponentContext>() });
    builder.Register(c => new CanteenBrowserViewModel() { ComponentContext = c.Resolve<IComponentContext>() });

    containerRegistry.RegisterForNavigation<NavigationPage>();
    containerRegistry.RegisterForNavigation<MainPage>();
    containerRegistry.RegisterForNavigation<SignUpPage>();
    containerRegistry.RegisterForNavigation<SignInPage>();
}

Basically the stuff is working the first time showing a ContentView. For example when showing the DashBoardView-Content the first time, I can resolve the IDataService using:

var dataService = this.ComponentContext.Resolve<IDataService>();

When I switch to the other view CanteenBrowserView and then back again, resolving IDataService leads into:

System.ArgumentNullException
  HResult=0x80004003
  Message=Value cannot be null.
Parameter name: context
  Source=Autofac
  StackTrace:
   at Autofac.ResolutionExtensions.ResolveService(IComponentContext context, Service service, IEnumerable`1 parameters)
   at Autofac.ResolutionExtensions.Resolve[TService](IComponentContext context, IEnumerable`1 parameters)
   at Autofac.ResolutionExtensions.Resolve[TService](IComponentContext context)
   at mealticker.ViewModels.DashboardViewModel.<Initializer>d__13.MoveNext() in D:\DEV\mealticker-mobile\mealticker\mealticker\ViewModels\DashboardViewModel.cs:line 29

I have no idea why that happens. Can anyone find the bug?
Or is there another best practise out there to implement such things?

Any help is appreciated.

Regards,
Maxx