HeaderTemplate not usable when using binding expression on iOS (works windows phone though)

First, I should explain what I'm trying to accomplish in case there is another way.

I want to create a resusable component (i.e. a contentview) which is basically a listview with templates and some functionality baked in.

I do want the user of this component to be able to specify a header if desired so I thought it would be easy enough to add 2 properties to the compent: HeaderTemplate and Header

        public static readonly BindableProperty HeaderTemplateProperty = BindableProperty.Create<Articles, DataTemplate>(a => a.HeaderTemplate, null);

        public static readonly BindableProperty HeaderProperty = BindableProperty.Create<Articles, object>(a => a.Header, null);

        public DataTemplate HeaderTemplate
        {
            get
            {
                return (DataTemplate)this.GetValue(HeaderTemplateProperty);
            }

            set
            {
                this.SetValue(HeaderTemplateProperty, value);
            }
        }

        public object Header
        {
            get
            {
                return this.GetValue(HeaderProperty);
            }

            set
            {
                this.SetValue(HeaderProperty, value);
            }
        }

In my xaml I bind the ListView properties to these properties:

<ListView
      ItemsSource="{Binding Source}" 
      Header="{Binding Header}"
      HeaderTempate="{Binding HeaderTemplate}">
      ...
</ListView>

This works perfectly in windows phone.. I can specify my own values for these properties in the consumer of my component. In iOS.. no such luck.. it doesn't display a header at all

Why is this?

I think it's because in the ListViewRenderer for windows phone we have:

    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
      base.OnElementPropertyChanged(sender, e);
      ....
      else if (e.PropertyName == "HeaderElement")
        this.UpdateHeader();
      ....

Nothing similar exists in the iOS renderer.. all the header template stuff happens in the OnElementChanged method (i.e. it just runs once when the element is set)

What about android? I don't know. I'm not developing for android and don't have a license to do so.

Finally, please let me know if this information is useful. I've reported a few other bugs in both the forums and in bugzilla but I've not got any acknowledgement of them from anyone at xamarin (although confirmation from other community members).