Control Throws a Null Exception When Hosted on a ContentView

[RuddySantos]

I am very new to this. The requirement I have calls for the webview to be hosted in a control (contentView). The HybridView shows fine and callling JS methods etc works. However, when I close the popup window that is hosting the control there is an object reference not set to an instance of an object exception on the OnHandlerChanged --> NavigationCore.

NOTE: This app uses Mopups for pushing/popping pages.