Hi,
Curiously, once a secret login URL is set in Classic Monks > Custom Login URL, accessing most of the WP login page URLs redirects to a 404 or a specific page:
/wp-login.php
/wp-admin
/admin
And accessing one of them redirects to… the secret URL, which undermines the very purpose of the function:
/login
Is it just me?
I checked the same feature in Perfmatters, /login is filtered alright as the others.