Apple Car-Play and iPhone 12 Pro Max (from IOS 14) / Permanent Problems

Hi, the Jaguar E-Pace from my wife is basically a reliable car. She drives it now as a new car for 1.5 years and loves her “Black Cat”. Since handover no defects, no workshop visit (except pick-up of a spare part wg. of a biting martens), actually “NULL” problems. If there were not Apple Carplay. Since my wife and I have each got us a new iPhone (12 Pro Max) happen strange things, which are unfortunately not immediately reproducible: – the iPhones are crashed when the cable connection is established (both) – a connection is established, but there is no sound coming from the infotainment system – sometimes it goes well for a while with an iPhone, then again not The software stands I have updated all; further updates are not offered. Has anyone here already experienced something similar? Or does someone know what it is? Thanks for your feedback.