'VirtualizingPanel.ScrollUnit="Pixel" doesnt work and change scrolling to smooth for listbox in .NET 4.7.2 wpf

I am interested in smooth (pixel) scrolling of ListBox but I don't want to use ScrollViewer.CanContentScroll="False" because it does not allow to virtualise ListBox view. I have read that starting by .NET 4.5 it is possible to use VirtualizingPanel.ScrollUnit="Pixel" which allows both virtualising and smooth scrolling, however it doesn't change the behaviour of my scrolling

Here is the code of the listBox (orientation is horizontal)

<ListBox Name="FilmsListBox" Grid.Row="1" Margin="50 25 50 30" HorizontalAlignment="Center" ScrollViewer.HorizontalScrollBarVisibility="Visible" VirtualizingPanel.ScrollUnit="Pixel" VirtualizingPanel.IsVirtualizing="True" VirtualizingPanel.VirtualizationMode="Recycling" ScrollViewer.CanContentScroll="True" Background="Transparent" BorderBrush="Transparent" Style="{DynamicResource TransparentListBox}">
                <ListBox.ItemsPanel>
                    <ItemsPanelTemplate>
                        <StackPanel Orientation="Horizontal"></StackPanel>
                    </ItemsPanelTemplate>
                </ListBox.ItemsPanel>
                
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>

                            <DockPanel Grid.Row="0" Margin="30" Width="125" Height="200" VerticalAlignment="Top" HorizontalAlignment="Stretch">
                                <Border BorderThickness="1.2" BorderBrush="#FF715C4E">
                                    <Image Name="FilmPosterImage" Stretch="UniformToFill" Source="Images/eternals_default.jpg"></Image>
                                </Border>
                            </DockPanel>

                            <TextBlock Grid.Row="1" Margin="10 0 10 25" TextWrapping="Wrap" TextAlignment="Center" HorizontalAlignment="Center" Name="FilmTitleTextBlock" FontFamily="Calibri" FontSize="22" Initialized="FilmTitleTextBlock_Initialized">Вечные (18+)</TextBlock>
                        </Grid>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>

Please help with some alternatives or explain why the expected tool as VirtualizingPanel.ScrollUnit doesn't behave properly

wpflistboxscrollviewer.net-4.7.2virtualizingstackpanel


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