Issue with multisite new user registration

I replicated this issue with a brand new install.

I am using multisite setup. I updated to WP 5.5 and noticed it no longer allows you to register for the individual site. In this example(testsite1 is the subsite), When a user clicks register -> https://www.test.com/testsite1/wp-login.php?action=register

It now redirects you to the main site https://www.test.com/wp-signup.php

I’m not sure if this is a bug (core.trac.www.ads-software.com) or its now designed this way.