Comment by Terr_

> currently playing audio metadata

Plain old Bluetooth has supported track/caller data for many years now (ex: AVRCP 1.3) so it should be no surprise that cars were made that read and display that information.

That said, if my car persisted that information I'd be rather suspicious.

P.S.: It's also not unknown to have a certain level of address-book contact sharing over BT, since people were making hands-free calls in their car long before CarPlay/Android-Auto came around.