Can you confirm that the problem is reproducible only when editing a single page? If that is so, can you try to duplicate the page, delete the old one and use the newly created copy of that page? You can also try to revert to an old version of the page, from the " Revision History " if you suspect that the page was corrupted as a result of some changes made to it.
the Telerik team
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system and vote to affect the priority of the items