That’s super weird, try disabling dark mode and see if it changes anything and play with different origin and destination as well.
Regarding getting that information in a formula unfortunately no, Google charges for that and the Pack is free and will remain free.
I tried using this pack in a doc published to a custom domain. The Google Maps API only showed this error (with identifying data removed):
Google Maps Platform rejected your request. This IP, site or mobile application is not authorized to use this API key. Request received from IP address xx.xxx.xx.xxx, with referer: http://doc.example.com
Is there any way to use my own API key with this pack? Or some other way to resolve this issue?
The API key is restricted to be used only from within a Coda domain, custom domains were introduced later and that caused a problem in your case. Please send me a DM with the domain and IP address and I will check to allow it.