If I create an instance of a let's say Label, it can't be added in two or more layouts. This instance should not be dependent on Layouts, that's why I am pretty sure it's a bug. Thanks to this, I can't implement effective view caching.
Minimal working example here:
var test = new Label { Text = "it should work 
" };
var a1 = new StackLayout ();
var a2 = new StackLayout ();
a1.Children.Add (test);
a2.Children.Add (test);