Xamarin Forms 4.0 CarouselView ColumnWidth = Star Doesnt Work!

Hello so here is my code taken from tutorial on xamnarin blog

    <CarouselView ItemsSource="{Binding Shippings}"                    
                          x:Name="Test"
                          HorizontalOptions="FillAndExpand" 
                          VerticalOptions="CenterAndExpand"
                          HeightRequest="300"
                          Margin="10"
                          >
                    <CarouselView.ItemsLayout>
                        <GridItemsLayout Orientation="Horizontal"
                                         SnapPointsAlignment="Center" 
                                         SnapPointsType="Mandatory"

                        />
                    </CarouselView.ItemsLayout>
                    <CarouselView.ItemTemplate>
                        <DataTemplate>
                            <Frame BorderColor="LightGray" HasShadow="False" HorizontalOptions="FillAndExpand" Margin="10">
                                <Grid>
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="5*"></RowDefinition>
                                        <RowDefinition Height="*"></RowDefinition>
                                    </Grid.RowDefinitions>
                                    <Grid.ColumnDefinitions>
                                        **<ColumnDefinition Width="*"></ColumnDefinition>**
**<ColumnDefinition Width="*"></ColumnDefinition>**
                                    </Grid.ColumnDefinitions>
                                    <StackLayout Grid.Row="1" HorizontalOptions="EndAndExpand" VerticalOptions="FillAndExpand">
                                        <Label Text="{Binding FirstLastName}" HorizontalOptions="Start"/>
                                        <Label Text="{Binding Company}" HorizontalOptions="Start"/>
                                        <Label Text="{Binding CodeCity}"  HorizontalOptions="Start"/>
                                    </StackLayout>
                                </Grid>
                            </Frame>
                        </DataTemplate>
                    </CarouselView.ItemTemplate>
                </CarouselView>

When setting Star to the width of column it simply doesnt work, the view doesnt stretch the columns, when I enter like 260 it does everything allright, but I dont want constant width because of different resolutions etc.

Its like column never appears maybe due to some errors or something, also Im not getting any errors in the logs and app runs fine.

Help me out please