I'm sorry to that the new security implementations have messed up with the functionality you have set up. One option although not very flexible is to create a custom navigation where you hardcode the links to these pages, so they will always get displayed. Another one is to grant permissions for everyone, but deny some specific content permission on that page and have a check in your control whether this particular content is present on the page or not - if not - redirect to your custom page.
the Telerik team
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