I've been searching for the last day and trying to solve this problem and am getting nowhere. Hopefully someone can guide me in the right direction. When editing old post the post takes a long time to update 2-3 hours. Wordpress comments also take a 2-3 hours to show after being approved. Things I've done. I am using autoptimize to cache the site and tried emptying the cache and deactivating it. Deactivate plugins. Cleaned up MySQL by deleting old revisions, removing spam comments. I have other sites on the same shared hosting with the same theme and have no problems with them. Anyone ever see this problem before? It's almost like a cache problem but I only use the Autoptimize plugin and have emptied the cache and deactivated it.