Hi Tim Ge,
Welcome on board!
Please ask the purchaser to add your email to the list of licensed developers so that you can get access to the support services, the latest hotfixes and downloads from within your account.
Now straight to your question: We cannot reproduce the behavior you are describing. Please, prepare a small project demonstrating the issue and send it to us via support ticket.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items