Hi Royce ,
We are indeed aware of this and I will go into some more details:
At the moment, we use the drag and drop functionality which is provided by the ASP.Net Ajax framework and so this is a current limitation.
However, we intend to provide our own implementation of this in the future which will address the problem.
For the time being, you will therefore need to workaround this in some way.
Thank you for your patience and understanding.
the Telerik team