System.NullReferenceException: 'Object reference not set to an instance of an object.' when removing items from the list:

 public Form1()
 {
     InitializeComponent();
     for (var i = 0; i < 30; i++)
     {
         var item = new ListViewDataItem();
         radListView2.Items.Insert(0, item);
         item[0] = i;
         item[1] = i;
         item[2] = i;
         item[3] = i;
     }
 }
private void radButton1_Click(object sender, EventArgs e)
{
    try
    {
        radListView2.BeginUpdate();

        foreach (var lvi in radListView2.Items.ToArray())
        {
            radListView2.Items.Remove(lvi);
           
        }
    }
    finally
    {
        radListView2.EndUpdate();
    }
}

Just to report a little typo in RadListViewElement:

Protected Overrides Sub OnCurrecntItemChanged(args As ListViewItemEventArgs)

Thanks.

This problem is even reproducible in our Demo application >> Virtual Grid >> Web service example. You will notice that when you scroll to the bottom, the waiting indicator is not being animated when the DPI scaling is higher than 100%.

If you apply the same gif file in a PictureBox it gets animated when using 150% DPI scaling.

Please refer to the attached sample project and follow the steps illustrated in the gif file.

Note: if the vertical  scrollbar is visible, the editor is activated as expected. 

Workaround:

Me.RadListView1.ItemSize = New Size(200, 30)