See this recording of the issue at runtime: https://www.screencast.com/t/EMOdMqs2yX 

Use the following to replicate:

<telerikDataControls:RadListView x:Name="listView"
                                 IsItemsReorderEnabled="True"
                                 SelectionMode="None">
    <telerikDataControls:RadListView.LayoutDefinition>
        <listView:ListViewLinearLayout Orientation="Horizontal" 
                                       HorizontalItemSpacing="10" 
                                       VerticalItemSpacing="0"/>
    </telerikDataControls:RadListView.LayoutDefinition>
</telerikDataControls:RadListView>