Grid No work in ScrollView

[galoch-s]

If the grid put in scrollview, then when there is a scroll. grid stops working.
Его просто не видно, а само приложение зависает
Samples
GridViewXamlPerformance grid = new GridViewXamlPerformance();
Button btnEnter = new Button { Text = "Показать элементы" };
btnEnter.Clicked += (sender, e) => { grid.ShowItems(); };

        MainPage = new ContentPage {
            Content = new ScrollView {
                VerticalOptions = LayoutOptions.FillAndExpand,
                Content = new StackLayout {
                    VerticalOptions = LayoutOptions.FillAndExpand,
                    Spacing = 0,
                    Children = {
                        btnEnter,
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        new Label {Text = "text" },
                        grid
                    }
                }
            }
        };