Message: "Signed in from another location"

[Falcc]

I woke up today and airmessage wasn't working.
Checking the server, the dropdown from the airmessage logo displayed "Signed in from another location".

Now, obviously I understand what this text means, but I wanted to know what could trigger something like this and if there is some way to see the location that was logged in from somewhere else?

I use both Google auth + password to encrypt the traffic.

For this to trigger, would someone have had to log into airmessage on a mac in another location using my google account?
I had no notifications or unusual locations listed in my sessions in google security.

I am suspecting that it's a false positive and something else triggered that message, but wanted to get your thoughts?

[Falcc]

@tagavari - This happened again today. Wondering if you might know something that could cause this to happen? Is there any way I can view the other location IP addresses or logged info?