This is an issue with command implementation. We will fix it right away and the fix will be available in the next week's internal build, as well in the next official release - 2013 Q1, expected in March. Note that you shouldn't be able to insert hyperlinks to bookmarks in the main document anyway.
Please, excuse us for the inconvenience. We have added points to your account for the report. Don't hesitate to contact us if you have other questions.
the Telerik team