Thank you for notifying us about this issue. We have ran our tests and came to the conclusion that this is a bug in Sitefinity. I have logged this into our system for fixing. Additionally I have opened a PITS issue where you can track its progress and vote to increase its popularity.
Please excuse us for the caused inconvenience. Your Telerik points have been updated accordingly.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items