I am still having intermittent CarPlay issues. It will drop the connection randomly, sometimes in the middle of a phone call or when using Apple maps for navigation and then pick it right back up a few seconds later. Then there are times when it will drop altogether, and act like the connection won't reconnect. When playing music, it still is extremely glitchy and acts like the bluetooth connection is not working like it should. Music will be playing, because the song actually advances and shows as such on the time bar, but we can't hear it. Then it comes back again like nothing was wrong. Things seem to be exacerbated when another phone (all Apple) is in the car with bluetooth enabled. Sometimes having the other phones shut bluetooth off (in settings, not the control center) makes it function better, sometimes it doesn't.
For me I have noticed I now seem to just roll with it when things happen. Maybe getting used to it being this way. Agreed on the Uconnect 4, was rock solid as when I had my DD in to check this very issue, the dealer put me in a Jeep Compass (talk about no power--lol!) that had Uconnect 4 and it had zero issues. I set it up and it worked the two days I had the vehicle, no issues. Connected right away.
It is funny how I have adapted--I now check to see if the CarPlay logo is on the screen so I can do stuff. If I just see the phone icon, I just look away. Ugh.