Description

On UWP, no navigation bar is shown with Forms version 3.1.0.637273. Works as expected on version 3.1.0.583944.

Steps to Reproduce

1. Open Visual Studio and create a new Forms solution targeting UWP
2. Update Xamarin Forms package to version 3.1.0.637273

3. Add the following to create the first page:

   ```public partial class App : Application
   {
   public App()
   {
   InitializeComponent();
   var page = new ContentPage { BackgroundColor = Color.Blue, Title = "Page title" };
   MainPage = new NavigationPage(page);
   }
   }

4. Run the UWP app

Expected Behavior

Page will show with a navigation bar displaying the page title

Actual Behavior

Page shows but there is no navigation bar and page title is not displayed

Basic Information

• Version with issue: 3.1.0.637273
• Last known good version: 3.1.0.583944.
• IDE: Visual Studio 2017

• Platform Target Frameworks:

  • UWP: 16299

• Nuget Packages: Forms

• Affected Devices: Windows 10 PC

Screenshots

Expected result:

Actual result: