Update PropertyPropagationExtensions.cs

Author: kubaflo

src/Controls/src/Core/Internals/PropertyPropagationExtensions.cs

@@ -28,7 +28,7 @@ internal static void PropagatePropertyChanged(string propertyName, Element eleme
 			if (propertyName == null || propertyName == Shell.NavBarIsVisibleProperty.PropertyName)
 				BaseShellItem.PropagateFromParent(Shell.NavBarIsVisibleProperty, element);
 
-			for (int i = 0; i < children.Count; i++)
+			for (int i = 0; i < children.ToList().Count; i++)
 			{
 				if (children[i] is IPropertyPropagationController view)
 				{

src/Controls/tests/TestCases.HostApp/Issues/Issue28162.xaml.cs

@@ -12,8 +12,8 @@ public Issue28162()
 
 		private void Button_Clicked(object sender, EventArgs e)
 		{
-			CollectionView.ItemsSource = new ObservableCollection<string> { "Item 1", "Item 2", "Item 3" };
 			CollectionView.IsVisible = !CollectionView.IsVisible;
+			CollectionView.ItemsSource = new ObservableCollection<string> { "Item 1", "Item 2", "Item 3" };
 		}
 	}
 }