Why does an unauthorized user not have a 404 error?

Question

1C-Bitrix

Good afternoon. I'm just getting started with php.
There was a problem in Bitrix. The site has registration, authorization, etc. I noticed recently that authorized users have a 404 error when they enter the wrong address. And unauthorized redirects to authorization. Although the authorization page itself looks different.

Answer 1

Why doesn't an authorized user get a 404 error?

Most likely, because you opened the section only for authorized users. In Bitrix, first the access rights to the page are checked, and then the actions on the page.