Child page does not inherit page restrictions from parent page
Platform Notice: Server and Data Center Only - This article only applies to Atlassian products on the server and data center platforms.
A child page is supposed to inherit the page restrictions from its parent page, but, for some reason, it does not inherit any restrictions.
Double confirm that the parent page has restrictions applied. Else, create a new page, add some restrictions to the page and create a new child page under it. The child page will inherit those restrictions by default. This will be depicted by an open red padlock icon. Note: Only view restrictions are inherited, Edit permissions are not inherited. See - CONFSERVER-5095Getting issue details... STATUS
The ancestor table will become out of sync occasionally.
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After rebuilding the ancestor table, you need to flush the "Inherited Content Permissions" cache in Cache Statistics, otherwise, the inherited permissions may not be applied immediately to all pages. You may also need to rebuild the content index so that the restriction will take effect.
Screenshot: Page level permissions