Hi Louis ,
We cannot reproduce that behavior with RadLabel, however there is a known issue with the custom designer of RadTabStrip. Are you using RadTabStrip by any chance? If the label, is in RadTabStrip, please open a support ticket and we will send you the solution.
If your case is different, we will once again ask you to open a formal support ticket and send us a project so we can reproduce the problem.
We are awaiting for your response.
the Telerik team