Add post overwriting permalink from previous post in 4.6
It seems to be a caching issue, though there isn’t a single cause for it. There is still ongoing discussion, as well as multiple suggestions for fixes about this on the WordPress issue tracker: https://core.trac.wordpress.org/ticket/37889 You can fix the symptoms by ensuring pages under “/wp-admin” are never cached. If using Apache, you can do this … Read more