Flyout icons not appearing

[elOG8]

Menu(Shell Flyout) for Desktop/tablet not showing correctly.

If this code is removed, icons appers but different.

        <Shell.ItemTemplate>
            <DataTemplate>
                <Grid
                    RowDefinitions="68" HeightRequest="68">
                    <Image Source="{Binding FlyoutIcon}"
                           VerticalOptions="Center"
                           HorizontalOptions="Center"
                           />
                </Grid>
            </DataTemplate>

        </Shell.ItemTemplate>

Is a bug? or just is missing code?

Thanks