redirect_canonical redirects to another URL when it should not

[melicerte]

Hi,

on a fresh install of WordPress 4.9.8 :

​http://sub.yourdomain.com/?xtor=AD-4970-%5BSocial%5D-%5B%5D-%5BPPL%5D-%5BFacebook%5D-%5B228284160&105478095%5D-%5B0%5D

will be redirected to :

​http://sub.yourdomain.com/?xtor=AD-4970-%5BSocial%5D-%5B%5D-%5BPPL%5D-%5BFacebook%5D-%5B228284160&105478095]-%5B0%5D

Problem is : it does an 301. And, combined with Facebook mobile on Iphone link to the WordPress, it retries forever. 21 000 hits / 5 minutes on our server. Glad it was strong enough to sustain until we find the bug and temporarily deactivated

redirect_canonical

with :

<?php
remove_action('template_redirect', 'redirect_canonical');