It's a quirk with ACP and NOT using Apple's default apps.
Another reason I hate Apple. You want to use some other apps? OK... it's going to be crippled though...
https://www.theverge.com/2018/9/28/17913786/google-maps-waze-apple-carplay-iphone-ios-12-review
Lol, oh Apple. You never cease to amaze.
From the article:
"Both Google Maps and Waze have released updates to their iOS apps that added support for CarPlay already, and I*ve been testing them for the past week or so. Unfortunately,
due to CarPlay*s inherent limitations and a number of bugs and performance issues, neither Google Maps or Waze are particularly compelling compared to their Android Auto counterparts or even Apple*s own Maps app.
If you*ve been using Apple Maps in CarPlay, you*re going to find that Google Maps and Waze look rather familiar. That*s because
Apple imposes a lot of restrictions on the way CarPlay apps are allowed to look, so all of the information, buttons, and options are generally laid out in the same way across all three apps.
What you won*t find in either Google Maps or Waze is the ability to get directions via Siri, through a microphone button on your steering wheel, the Hey Siri voice command, or long-pressing the home button on the CarPlay screen.
Apple limits Siri interactions to its own apps. So just like how you can*t ask Siri to play something in Spotify, you also can*t ask it to give you directions to your house in Google Maps."
Everything in the Apple ecosystem works great together, but the moment you step out of the box it puts you in, issues arise. This is part of the reason why I never moved to Apple, and it's why 90% of the people I know personally have switched from iOS to some other variant of Android.
RLCarrington, I'd suggest sticking with Apple Maps until GMaps and/or Waze figure out how to play nice with the limitations/restrictions in CarPlay.