Hi Terje Johansen,
Unfortunately, this is a known bug in the RadRibbonView. You can vote for this associated PITS item in order to increase its development priority. The workaround you suggested is probably the most appropriate way to go in this scenario.
Please accept our apologies for the inconvenience caused.
the Telerik team
Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>