I think this might have introduced a bug. I missed a yearly mail for verifying the email address, and didn’t find a link to click to get a new verification mail. I tried changing the email address, which sent a new confirmation mail, and then gave the option to cancel the mail change.
I cancelled the mail change, and was able to log in with the original email, and not get the notification about verification not being done.
A day later, logging in with either the original or new email address both fails (error “Invalid Email or password”). Creating a new account with the new email works, creating a new account with the old email fails (“is invalid”). Password reset with the original email fails (“not found”). The original account seems to be stuck in zombie mode.