CarPlay Phone app icon reverts to dark after car restart

Hi everyone, I’m having an issue with CarPlay icons. I set all my app icons to transparent, and they display correctly — but after restarting the car, the Phone app icon always turns dark again, while all the others stay transparent. It briefly appears transparent when I switch views, but once CarPlay reloads, it reverts to the dark icon. Does anyone know why this happens or how to fix it?