PopToRootAsync isn't working in my Windows Phone(8.1) project

Hi,

I have used PopToRootAsync call in many places in my Xamarin.Forms PCL project which is shared by all the three platforms Android, iOS & WindowsPhone. But PopToRoot method is not working in my Windows Phone project, its working nice in other platforms. In WinPhone it executes the PopToRoot method without any exception, but its not navigating to the root page, it just remains in the same page.

I am not sure what is causing this issue, please someone help me to fix this.