How to prevent logged-in users from opening /login

In testing my site with some users I notice they will navigate using their back button after logging in. This returns them to the /login page, which is currently Accessible to Everyone. Since the user is already logged in, they see some basic version of their Profile picture, a horizontal line, and a link to Your Account, and Logout.

I changed the UM permissions on this page to be Accessible by Logged Out Users, with a redirect URL back to the main homepage – but this isn’t working. It looks like the setting is merely ignored, and users can still visit the page…