When logging into the mobile app via Coinbase, I have to:
(1) Enter my credentials, and then...
(2) Use my 2FA app to finish the login.
Switching between other apps and the login screen while entering my Coinbase credentials works just fine.
However, when I switch to the 2FA app to finish the coinbase login (because I use 2FA with coinbase), and then come back to the login attempt, my session gets wiped and I have to start again. That's the problem. This could be complicated by my use of Firefox Focus as my default mobile browser. I don't know if that plays a role or not.
This is not usually a problem with mobile app logins when I leverage account X to login to application Y, though I don't usually leverage my coinbase login on other apps on my phone. it's usually Facebook or Google.
To overcome this, the way I actually have to login is to remember my 2FA digits in advance, and then I log in within the 60 second window before the 2FA code rotates again.
It's not a good user experience. Please fix. Let me know if you need further info from me.