My 2019 LTZ started this past spring, it would ask for password, disconnect phone, and Carplay would turn off and on by itself, the radio screen would go blank and turn back on as if I had shut it off and turned on, while driving. Contacted dealer when it first happened and they said it’s due to not using genuine Apple cords. Started using Apple usb and c cords and still did it. Took it in on President’s Day for service and requested they look at radio as well to see what password it needed and tech said he plugged his phone in and there was no problem. Not happy, I have an extended warranty, put local dealer says they won’t honor it, I have to go to the dealer I purchased from which is 40 minutes away. I’ll try the Chevy app password and hopefully it helps. Thanks for the information.