I used this geocode url to lookup the lat long for a locality Arlington,OR,US:
and I got a lat long in Arlington TX: 32.7356870,-97.1080656
How can I prevent this? Is this a known issue?
Several other cities -- all in Oregon -- get results in the wrong state: Aurora, Harrisburg, Jefferson, Oakland, Toledo, and more.
If I change the capitalization, a lat long in Oregon is returned.
It seems to be a known issue.
The similar problem was reported in the public issue tracker:
https://issuetracker.google.com/issues/35830289
Hopefully Google will solve it soon. You can star the public issue to receive further updates from Google.
In the meantime, I found the following workarounds
Remove US from address string https://developers-dot-devsite-v2-prod.appspot.com/maps/documentation/utils/geocoder/#q%3DArlington%252COR%26nfw%3D1
Use complete name of the state https://developers-dot-devsite-v2-prod.appspot.com/maps/documentation/utils/geocoder/#q%3DArlington%252COregon%252CUS%26nfw%3D1
Use component filtering with a complete state name https://developers-dot-devsite-v2-prod.appspot.com/maps/documentation/utils/geocoder/#q%3D%26options%3Dtrue%26in_country%3DUS%26in_administrative_area%3DOregon%26in_locality%3DArlington%26nfw%3D1
Hope it helps!
PS. It looks like you have a Premium plan license (client ID). In this case you can file a support case in Cloud support portal:
https://developers.google.com/maps/premium/support#contact-support
