This is just an artifact of how we parse the URL, and is already available via $request->get_route() Props danielbachhuber. Fixes #34647. Built from https://develop.svn.wordpress.org/trunk@35659 git-svn-id: http://core.svn.wordpress.org/trunk@35623 1a063a9b-81f0-0310-95a4-ce76da25c4cd