I'm on 6.2.3. I'll try updating and retry.
As for the documentation, the only difference for me is in the "confirmation window." I get This site cannot be reached instead of Recieved verification code.
As you believe, they should both work if you are connected to Gmail. What version of FreeFlow Core are you on? Might recommend you update it to the latest 6.2.8 and try again?
I just finished generating some documentation for Gmail and Core and both notifications and review are working for me.
Attached is documentation I just finished for Gmail.
I'm using Gmail to send notifications and it seems to be working for job failure notifications, but I can't get the review node to send an email. I've tried re-connecting my gmail account, and there seems to be weirdness there as well. It appears the authorization goes through, I got the change notification on my phone, but where the confirmation web page would be, I get dead ended at the http://127.0.0.1/ loopback address.
Any thoughts on why these two functions would be behaving differently?