Practically the first action I made after eswiki was switched to vector-2022 was to use Alt-o to Log In.,, and discover it doesn't work.

It turns out vector-2022 uses accesskey="o" on two links: pt-login and pt-login-2 (I only found one on the UI, but the second is there in the source code), which causes the browser not to send you to the target page directly (Special:LogIn in this case).

accesskey="f" is used twice as well, by searchInput and the button to actually search (?)