After deleting a restricted page, the children still retain the inherited restrictions - until a first edit.

(1) After deleting a restricted page, the children still retain the inherited restrictions - until a first edit.

1. I have created a Restricted page (viewing restricted just to me), and a Child page of this page.
2. The Child page has correctly inherited the viewing restrictions.
3. I have Removed the Restricted page.
4. The Child page was still retaining the restrictions. The page info was still listing the restriction as inherited from the parent - even though it wasn't listing any parent and the page was an orphan page. When trying to view the page under a different account, I got a Not permitted due to inherited restrictions error.
5. I have edited the Child page - just opening in the editor and saving. The bogus inherited restrictions went away.

I believe this is a bug. After removing the parent restricted page (step 3), the inherited restrictions on the child page should have gone away immediately, and not only after editing the page.