Google Play Games Services: "choose email" shows up twice

I am using the "Minimal " example from the official Google Play Games Services unity plugin github repo found here.

When you first launch the app and authenticate is called I get the GPGS “choose a google play account” dialogue popup. Much like this one

After choosing an account authentication goes through fine and I see the username at the top.

Afterwards a second dialogue will show that looks like this

This second dialogue does not seem to have any affect on the GPGS implementation in my actual game (tested with different account saves). This second dialogue will show at the start of every launch, while the first one will not (because the first login is cached).

What is this second dialogue a part of, and how can I prevent it from showing?

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