Should be clicked somewhere else afterwards in order to refresh the cursor. The fix is available in R2 2016 SP1.
As a workaround of the issue you could manually release the mouse capture in the SelectionChanged event handler of the control as shown below:
private void radAutoCompleteBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (e.RemovedItems.Count > 0)
{
if (Mouse.Captured is RadAutoCompleteBox)
{
(sender as RadAutoCompleteBox).ReleaseMouseCapture();
}
}
}
Regards,
Atanas
Telerik