Phone shows miles, car play shows kilometres

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/phone-shows-miles-car-play-shows-kilometres/
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I recently did a long journey and got to really test ABRP. One issue I found was that my units are set to British but often but not always when I connected to Car Play it would show everything on kilometres. I’ve attached screenshots showing the car play and my mobile.