Xamarin forms masterdetailspage with a listview - xamarin.forms

Question

I'm having a strange problem graphically using the xamarin forms masterdetailspage with a listview.
I state that this problem does not occur in the emulator.
I attach a video.
https://imgur.com/a/CKzh9ku
<ScrollView>
<ListView x:Name="menuRouteView"
Margin="{d:OnPlatform Android='0',iOS='0,40,0,0'}"
ItemTapped="menuRouteView_ItemTapped">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout Orientation = "Horizontal" Margin = "5">
<Image Source = "{Binding icon}"/>
<Label FontSize="Medium" Text = "{Binding name}" Margin = "5"/>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ScrollView>
public MasterPage()
{
InitializeComponent();
/**
* Init menu dynamic
*/
Route routeClass = new Route();
createMenu(routeClass);
}
public void createMenu(Route routeClass)
{
List<Route> routeListSecondary = routeClass.getAllData();
List<Route> routes = new List<Route>();
if (routeListSecondary.Count() > 0)
{
routes.Add(new Route() { name = "Pagina utente", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "ic_blue_action_home.png", to = "menu", action = "" });
routes.Add(new Route() { name = "Email", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "ic_blue_content_drafts.png", to = "email", action = "" });
routes.Add(new Route() { name = "Calendar", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "ic_blue_calendar.png", to = "agenda", action = "" });
routes.Add(new Route() { name = "Chat", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "ic_blue_communication_message.png", to = "chat", action = "" });
routes.Add(new Route() { name = "blu d'hOC", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "ic_blue_action_description.png", to = "bludhoc", action = "" });
foreach (var item in routeListSecondary)
{
routes.Add(new Route() { name = item.name, url = item.url, fullScreen = item.fullScreen, addUserKey = item.addUserKey, primary = false, icon = "iconNavigation.png", to = "", action = "" });
}
routes.Add(new Route() { name = "Configura", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "ic_blue_action_settings.png", to = "", action = "ConfigurationPage" });
//routes.Add(new Route() { name = "ZXingScanningPage", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "ic_blue_action_settings.png", to = "", action = "ZXingScanningPage" });
routes.Add(new Route() { name = "Documenti scaricati", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "ic_blue_file_cloud_done.png", to = "", action = "DownloadDocuments" });
}
else
{
routes.Add(new Route() { name = "Workflow", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "", to = "", action = "ApplicationInfo" });
routes.Add(new Route() { name = "Chi siamo", url = "", fullScreen = "", addUserKey = "", primary = true, icon = "", to = "", action = "BusinessInfo" });
}
menuRouteView.ItemsSource = routes;
}
Here is a part of the code used, personally I don't see anything wrong.
Thanks so much.