I cannot access the Two Factor authentication page at all - it is when attempting to access that page that I'm forced to log in again and provide a 2FA code.
I'd assume it's more likely the behavior really is changing, specifically because in the past, the user's login session was treated as a valid factor alongside the user's password for disabling 2FA, which was criticized as being less secure than expected. However, I'm not sure they intended for the fix to that to not allow backup codes...