Yes my point is if the Google WIFi router is not reporting the WAN IP address as the same IP Address as What is my IP then there is some networking issue. Maybe “double NAT”. For why double NAT is a problem, take a read of the links below.
https://kb.netgear.com/30186/What-is-Double-NAT
https://support.google.com/wifi/answer/6277579
http://www.practicallynetworked.com/networking/fixing_double_nat.htm