Update from one of users in above thread, he got info from support
Update
Google support says this is a system issue they're having right now.
Anthony Price
8:36 AM
so it's a system issue, not a security issue?
Jessy R
8:36 AM
Absolutely, not.
Jessy R
8:36 AM
Not to worry! This is a bug and we are working to fix this so that our users do not receive such email and do not face any trouble.
Update
Google support says this is a system issue they're having right now.
Anthony Price 8:36 AM so it's a system issue, not a security issue? Jessy R 8:36 AM Absolutely, not. Jessy R 8:36 AM Not to worry! This is a bug and we are working to fix this so that our users do not receive such email and do not face any trouble.