UWP IsVerticalRailEnabled not working - xaml

Question

I have a Scrollviewer wrapping a ListView of movie posters, and it is scrollable verticaly and horizontaly and also zoomable.
When I set IsHorizontalRailEnabled="False" to the Scrollviewer the horizontal rails are effectively disabled, but whatever the value I assign to IsVerticalRailEnabled, the rails are never disabled.
<ScrollViewer ZoomMode="Enabled"
MinZoomFactor="0.1"
MaxZoomFactor="1"
VerticalScrollBarVisibility="Auto"
HorizontalScrollBarVisibility="Auto"
IsVerticalRailEnabled="False"
IsHorizontalRailEnabled="False">
<ListView Grid.Row="0"
Name="MovieListView"
ItemTemplate="{StaticResource ItemTemplate}"
ItemsSource="{Binding movie_posters_list}">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<ItemsWrapGrid MaximumRowsOrColumns="15" Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
</ScrollViewer>
I cant find any helpful documentation about this weird behaviour, any idea how to correct it ?

Answer 1

EDIT : As Justin XL mentionned in the comments, this way is breaking the UI virtualization of the ListView, and therefore should be avoided. See his comment for more info
I found the answer myself. I do not fully understand why I had to do that for it to work but OK. If you have an explanation on why I had to duplicate the property usage I would appreciate it :)
All I had to do is add ScrollViewer.IsVerticalRailEnabled="False" to my ListView element.
Note that I have to keep IsVerticalRailEnabled="False" in my ScrollViewer too for it to work.
Here is the updated xaml :
<ScrollViewer ZoomMode="Enabled"
MinZoomFactor="0.1"
MaxZoomFactor="1"
VerticalScrollBarVisibility="Auto"
HorizontalScrollBarVisibility="Auto"
IsVerticalRailEnabled="False"
IsHorizontalRailEnabled="False">
<ListView Name="MovieListView"
ItemTemplate="{StaticResource ItemTemplate}"
ItemsSource="{Binding movie_posters_list}"
ScrollViewer.IsVerticalRailEnabled="False">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<ItemsWrapGrid MaximumRowsOrColumns="15" Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
</ScrollViewer>