Different Editor control styling on iOS

Hi

I have Visual Studio 2015 on Windows 10.
I have a Xamarin multiplatform project for Androd, iOS, WinPhone 8.0 Silverlight.

On one page I have the following xaml code:

<StackLayout Orientation="Vertical">
  <Label Text="Comment" />
  <Editor Text="test" HeightRequest="96" />
</StackLayout>
<Entry Text="test" />

The Editor control and the Entry control have the same styling on Android and WinPhone. But on iOS the Editor control has differences: no border and smaller font. You can see it on the screenshot.

Can anybody help me please? How can I have the style of the Editor control identical to the style of the Entry control on iOS?

With best regards,
Aleksandrs