title: Xamarin Forms, error in the Master Details
body: <p>When I return to the Root Page with this method:</p>
  
  <pre><code>Page page = (Page)Activator.CreateInstance(typeof(TrasfMagaPage), session);
                      Navigation.InsertPageBefore(page, Navigation.NavigationStack[0]);
                      await Navigation.PopToRootAsync(true);
  </code></pre>
  
  <p>The icon of the hamburger menu disappears from the TopBar.</p>
  
  <p>I use the same code with all the other pages, but only in this case it presents the problem.</p>
  
  <p>How is that possible?</p>