Xamarin Forms Shell: Dynamically remove FlyoutFooter

Question

It seems as though hiding the FlyoutFooter with IsVisible doesn't cause the scrollview for the Flyout Items to resize to take up the unused space.

Example:

Footer declaration in .xaml:

<Shell.FlyoutFooter>
    <StackLayout Spacing="0" BackgroundColor="Pink" HeightRequest="200">
        <Button x:Name="btnCloseTip"
                                    Text="X"
                                    Clicked="btnCloseTip_Clicked"/>
    </StackLayout>
</Shell.FlyoutFooter>

Click handler:

    private void btnCloseTip_Clicked(object sender, EventArgs e)
    {
        var footer = (StackLayout)this.FlyoutFooter;
        footer.IsVisible = false;
    }

This hides the pink footer, however the space reserved for the footer is not reallocated to the scrollview that contains the items, leaving a 200 unit high empty space below the scrollable list of flyout items. Is there any way to force the flyout menu to redraw/resize after hiding? I have tried setting the layout bounds to a 0,0,0,0 rectangle as well, which also had the same (no-)effect.