ScrollView with a Label cut bottom text on Android Vertical mode

Hi
I need to show the user an long eula text.
I have an Label in a ScrollView i a Grid.

This code works on iOS and on Android in landscape mode?!?!?
but in Vertical mode on android it cut the text off about when there is about 20% left.

Does anybody have an idea what is going on?

(the "HeaderView" is just a gridview that i use to display a header)

`

public eulaAcceptPage(string eula)
{
    this.eula = eula;
    InitializeComponent();
    setlayout();
}

private void InitializeComponent()
{
    header = new HeaderView( text.consent(), text.back(), false);
    buttomHeader = new HeaderView(text.no(), text.giveConsent(), text.yes());

    consentText = new Label {
        Text = eula,
        LineBreakMode = LineBreakMode.WordWrap,
    };

    scrolltextView = new ScrollView {
        Orientation = ScrollOrientation.Vertical,
        Content = consentText,
    };

}

private void setlayout()
{
    Padding = new Thickness(1, Device.OnPlatform(20, 0, 0), 1, 5);

    grid = new Grid
    {
        VerticalOptions = LayoutOptions.FillAndExpand,
        HorizontalOptions = LayoutOptions.FillAndExpand,
        RowDefinitions =
        {
            new RowDefinition { Height = new GridLength(60, GridUnitType.Absolute) },   //0
            new RowDefinition { Height = GridLength.Auto },                             //1
            new RowDefinition { Height = new GridLength(60, GridUnitType.Absolute) },   //2
        },
        ColumnDefinitions =
        {
            new ColumnDefinition { Width = GridLength.Star }, //0
            new ColumnDefinition { Width = GridLength.Auto }, //1
            new ColumnDefinition { Width = GridLength.Star }, //2
        }
    };

    grid.Children.Add(scrolltextView, 0, 3, 1, 2);

    grid.Children.Add(header, 0, 3, 0, 1);
    grid.Children.Add(buttomHeader, 0, 3, 2, 3);

    Content = grid;
}

protected override void OnDisappearing()
{
    header.leftButton.Clicked -= backButton_Clicked;
    buttomHeader.rightButton.Clicked -= ConsentGivenButton_Clicked;
    base.OnDisappearing();
}

protected override void OnAppearing()
{
    header.leftButton.Clicked += backButton_Clicked;
    buttomHeader.rightButton.Clicked += ConsentGivenButton_Clicked;
    base.OnAppearing();
}

`