Thank you for your feedback! First I want to apologize for the delay in our answer. Unfortunately we didn't observed similar behavior in the numerous applications with RadCoverFlow we have created by now. I believe that the problem might be caused by the way you are using the control, so I would like to ask you to open a new support ticket and send us a simple application that could be used to observe the problem. We will do our best to provide a fix or guidance how to avoid it.
the Telerik team