To reproduce:
- Add RadListView to a blank form and bind it to a datatable with large number of rows.
- Click the down arrow of the vertical scroll.

Workaround:

public class MyListView : RadListView
{
    protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs e)
    {
        this.ListViewElement.ViewElement.VScrollBar.Capture = false;
        this.ListViewElement.ViewElement.VScrollBar.ThumbElement.Capture = false;


        base.OnMouseUp(e);
    }
    public override string ThemeClassName
    {
        get
        {
            return typeof(RadListView).FullName;
        }
    }
}