Disable scrolling for mouse-over in ComboBox (WPF)

Is it possible to disable the autoscrolling effect in a ComboBox Dropdown? The Problem is when the mouse is hovered over the last element of the open ComboBox it automatically scrolls to the next element.

And in my case the ComboBox is at the bottom of the screen and the list is displayed upwards and when i open the ComboBox and move the mouse, it scrolls down immediately.. My XAML looks like this:

<ComboBox x:Name="serverSelection" ScrollViewer.CanContentScroll="False" Width="268" Height="54" FontSize="18" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" SelectedIndex="0">
    <ComboBoxItem Content="xenappts01" HorizontalAlignment="Left" Width="280" Height="54" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
    <ComboBoxItem Content="xenappts02" HorizontalAlignment="Left" Width="280" Height="54" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
    <ComboBoxItem Content="xenappts03" HorizontalAlignment="Left" Width="280" Height="54" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
    <ComboBoxItem Content="xenappts04" HorizontalAlignment="Left" Width="280" Height="54" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
    <ComboBoxItem Content="xenappts05" HorizontalAlignment="Left" Width="280" Height="54" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
    <ComboBoxItem Content="xenappts05c" HorizontalAlignment="Left" Width="280" Height="54" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
</ComboBox>

I tried to set ScrollViewer.CanContentScroll="False" but that didnt work.

This is what it looks like:

https://i.stack.imgur.com/GcwJX.gif

Thanks for your help!