Editor with vertical scroll bar

Hi,

I am using Editor for Multiline text. If the text is longer than the editor height, i am able to scroll the text, but vertical scroll bar is not shown. How to make scrollbar visible in Editor if the content inside Editor is longer than Editor's height?

Below is my code.

<?xml version="1.0" encoding="UTF-8" ?>
<ContentPage
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="HelloXamarinForms.EditNote"
    Title = "EditNote">
    <ContentPage.Content>
    <ScrollView>        
         <StackLayout Spacing="10"
               VerticalOptions="FillAndExpand"
               Orientation="Vertical">

                   <Editor
                        BackgroundColor = "#FFFFCC"
                        HeightRequest = "100"
                        IsFocused = "True"
                        x:Name="noteArea"
                            >
                   </Editor>    


         </StackLayout>

    </ScrollView>


    </ContentPage.Content>
</ContentPage>