OP , my audio would cut out 3 or 4 times quickly with in the first 2-3 minutes that the vehicle was first started for the day. Then worked fine. No other issues with screen features. I was going and trying to figure out out is it CarPlay or my Bluetooth or iPhone. While I was trying starting up with CarPlay connected or not , repairing my IPhone over a short period of time and not being able to correct problem . I then received a warranty update letter from GM for a Software Wi-Fi Module Update on my vehicle I had dealer do the update and haven’t had an audio cut out sense ! It took about a 45 minutes at dealer ! Hope this info helps.
Updated was done about 2 1/2 months ago ago .