CarPlay very buggy (for me) iOS Public Beta 2 on iPhone XS Max, 2017 Audi Q2 MMI system. When connected it can take over 5 minutes to show as connected, Google Maps when opened takes similar time to go from blank white screen to map screen and then freezes! Not every time but what seems like most times or whenever I really need it
CarPlay has been nearly flawless on my 2020 Ford Escape Titanium (SYNC3).