Properties not appearing for majority of pages.

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Have an issue recently where page properties (under site map) are not showing for the majority of our pages. We have checked and the pages where properties not showing up have same settings and permissions, as the pages with properties showing up . Permissions are set correctly on all pages. Yet properties is missing on most of our pages now. This is issue as we cannot change page names, cannot change URL's, add URLS , hide pages, etc without having properties available to us. Has anyone ever had this issue before??

See comparison below of what I am referring to.

we are on 5.6.3.2

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