Update on test: seems to work as you intended now, Kent.
Within the 10 mins from the post the edit button is visible and allows user to edit.
After 10 mins, if user does not cause the page to refresh then the edit button is still visible but when clicked raises a dialog box to indicate the post is no longer available for edit. If the page is refreshed after the 10 min expiry then the edit button is no longer visible.
Thank you for fixing this.
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