2FA doesn’t work

I enabled the Limit Login Attempts > 2FA setting for users having the administrator role. I then tested it out, going to my WP login page and providing my username and password. When I submitted those, I was sent the email with 6-digit OTP code. Everything good up until this point. I then typed in the 6 digits into the 2fa form on the site, and the keystrokes seemed to register, since each one advanced me to the next number field. But none of the numbers I typed in were visible. After keying in the 6th and final number, I clicked to submit, and got bounced back to the login page, with a message saying my username and/or password were incorrect. Has anyone else experienced this? Is it expected behavior not to show the code numbers as they are typed in? Any ideas what I could check? Thx in advance…