FontFamily not working when using TextProperty binding

I seem to be experiencing a bug with FontFamily in Android. As long as the text ion my label is hard-coded in the label, my custom renderer renders the provided FontFamily just fine. However, if I have the label's TextProperty bound, the font never makes it to the final screen.

Has anyone else experienced any issues with FontFamily?

This is a big one for us on our side. I'd greatly appreciate any feedback from Xamarin or workarounds from the community.

Here's my working Android custom renderer:

[assembly: ExportRenderer(typeof(Label), typeof(CustomLabelRenderer))]
namespace Aria.Droid.Controls
{
    public class CustomLabelRenderer : LabelRenderer {
        protected override void OnElementChanged (ElementChangedEventArgs<Label> e) {
            base.OnElementChanged (e);

            var fontFamily = e.NewElement.FontFamily;
            if (!string.IsNullOrEmpty(fontFamily))
            {
                if (!fontFamily.Contains(".ttf")) fontFamily += ".ttf";
                var typeface = Typeface.CreateFromAsset(Forms.Context.Assets, fontFamily);

                var label = ((TextView)Control);
                label.Typeface = typeface;
            }
        }
    }
}