I am trying to update my app to support iOS 11 Large Texts feature. In my custom Navigation Page renderer I have set
NavigationBar.PrefersLargeTitles = true;

The Large Title texts are displayed fine and on scroll they get smaller too. However on scroll when the Large Title becomes smaller, I am seeing an extra white space at the bottom. (Highlighted in the attached screen shot). I have read and browsed a lot of posts regarding the issue but my bad luck that none of them works.
I am pretty sure someone would have encountered the error and would have found a workaround or it's solution. I have also posted the same question in Xamarin Forums but no responses. https://forums.xamarin.com/discussion/104457/xamarin-forms-ios11-large-title-text-extra-blank-space