I use a Garmin Forerunner 970, both on the mobile app with Connect, but also Garmin Connect on the web at connect.garmin.com.
I'm not someone that views the web browser version in Chrome as a backup to the mobile--it's a primary way I manage my data.
It seems like every hour or two, I get logged out and I'm asked to re-log in with another MFA push to my email.
This began happening like about two months ago. Before that, Garmin's website had much better state management.
There's something about it now that is causing me to get logged out almost every single time that I visit it, and it's a really terrible user experience.