Vlad I’m on Ventura and the issue occurs. The form validation works (as shown in your screenshot) and submitting invalid login credentials provided correct error feedback, it’s only when logging in with an actual account that causes the loop.
I’m guessing a valid login redirects to a separate page that sets the authentication cookies or however they’re persisting login, then redirects to the account page, but somewhere along the way the credentials are lost/never persisted in the first place, causing the site to redirect back to the login page.
I’ll try and dig through the request & response headers when I have time to see what’s going on in more detail.