Have been able to confirm the issue on test install. When logged in via twitter it appears the session is not being saved correctly. Not comfortable enough with twitter auth to take this further.
Gareth EllisFebruary 20, 2016 at 11:27 AM
I had the same issue. I logged in using my Twitter account and then it's leaving comments as anonymous.
While logged in I commented on this talk https://joind.in/event/nomad-php-february-eu/the-life-of-an-if-statement .
(Second comment)
As you can see it's says anonymous.