Error with Custom Login URL

Hello,
In Custom Login URL we insert the slug, for example “access” and enter our account.
The problem comes when we leave our wordpress account and immediately insert wp-admin, login or wp-login.php, since it takes us directly to the wordpress login page without having to put the slug.
In short, if when leaving our account we put wp-admin, login or wp-login.php we can enter the wordpress login directly without putting the token or slug created in Custom Login URL.
I’ve tested it on 3 clean test websites.

Thank you and greetings.