frabcus

Thanks!

We narrowed it down to the redirect_canonical filter.

It is enabled in wp-includes/default-filters.php as a global filter, and the code for it is in wp-includes/canonical.php.

It has changed in various ways from WordPress 4.4.2 to 4.5.

Luckily we don’t need the filter, as we do redirects like the www version of our site at a higher level in the web server configuration.

We’re suffering from a similar problem – did you get anywhere with it, or work out what change to WordPress caused it?

We’ve quite a complex system of proxies and redirects, unfortunately.

In the end I found the button to enable it under the Screen Options pulldown.

https://en.support.wordpress.com/screen-options/

I’ve the same problem!

What makes it work again?

I’ve the same problem.

andrewdowling, would you mind saying what the issue was and how you fixed it?