I posed this ...
I think I found the problem with the disconnect in CarPlay.
I have a KIA 2018 Stinger GT2. I have Had this problem for 4 months.
Are you ready .... Apple (iPhone) MAPS has been causing the issue.
I stumbled across it when I turned off the Radio and closed the apps on my iPhone.
Apple Maps popped up on my Radio. (Not the Nav that comes with the Radio) It was running. I didn't open it or use it! it must have been running in the back round using resources. I deleted the App from my iPhone. Thank god (Apple), lol allowed users to uninstall there apps.
Once I did that I rebooted the iPhone connected back using the same Lightning Cable and proceeded to see if every thing was still functioning, it was, then I took a drive. Everything is working perfectly. Even all the information for Waze, SiriusXM and other music providers are working great.
Been working with no issues for about 10 days straight. WOW, what a relief.
Funny thing though, every once and a while a little window comes up and reads "Apple maps needs to be installed. go to the apps store". LOL.