Help with ScrollViewHandler for iOS

[WebGoose]

We have an issue on iOS where a scrollview size is not updated when it's content changes (hiding or showing children, etc).

I found a fix for this problem here but this handler only fires when the size increases. When we hide the content again the scrollview does not shrink back to it's original size and leaves space at the bottom of the page.

How can I get this to fire when the size decreases as well?

ScrollViewHandler.Mapper.AppendToMapping("ContentSize", (handler, view) =>
{
var contentSize = handler.VirtualView.ContentSize;
var size = new Size(contentSize.Width + view.Padding.HorizontalThickness, contentSize.Height + view.Padding.VerticalThickness);
handler.PlatformView.UpdateContentSize(size);
handler.PlatformArrange(handler.PlatformView.Frame.ToRectangle());
});`

Thank you :)