Two factor authentication not working, hangs up

I have a Venu 3 and did an ECG reading. Garmin Connect on my iPhone keeps giving me a notification to sign in through 2 factor auth. I get the email with the code and I enter it where prompted on the app, but it just has a loading spinner for minutes before it times-out. Then it sends me another notification - now up to about 20 notifications so far today and it's getting old. I just want it to stop at this point - I can forgo the stupid ECG if I can just stop these notifications. It's getting really annoying.