I'm on my corporate proxy and using Google 2-factor authentication to log into my machine. When I get the notification on my phone, it says that I'm trying to connect from Moscow, Russia, even though I'm in the United States. In the past, this has not been a problem. It only started occurring a few weeks ago. As such, I'm worried about a Man-in-the-Middle attack.
Is it normal for Google to display incorrect 2-factor login locations when behind a proxy?