I suspect that some of this goes back to something pointed out by @stevob here last year.
When doing a WHOIS, some Quic subnets have the country set as US, not NZ. i.e. 5.134.84.0/23 is US but others show as NZ. If any website uses this to determine geolocation then it may create a problem.
A couple of other sites that get tripped up are https://www.aliexpress.com/ and https://www.windy.com/