I do not have wireless in my EX and it is NOT the Iphone cord. Car Play randomly disconnects and then might come back at any time.
KIA says they know of the problem and suggests it is APPLE. Who is one to believe?
Garden54
While I understand and believe you are experiencing ACP disconnects, this by itself does not implicate Apple or Kia for that matter. First, before dismissing the cable out-of-hand, are you positive you're using a genuine, undamaged Apple cable or 3rd party vendor's cable that has been MFi certified? I've been burned in the past by budget cables that work fine for charging and low bandwidth data, but won't work for high-speed data transfers typical of some ACP navigation apps. Second, is the lightning socket on your iPhone clear of pocket lint that could interfere with proper seating of the cable's connector?
Assuming all of this has been addressed, there may be issues with the manner in which connection management/sanity checking is done at higher levels of the OSI stack that are common to wired and wireless ACP. My intuition puts high odds it's on the Kia infotainment head unit. Apple has an army of design architects, software engineers, systems engineers, and test teams to turn loose on ACP. Hell, they wrote the requirements specification for the interfaces. They work in the same building as the iOS teams. Kia likely has a handful of head unit software engineers and these days, who knows? The work could be outsourced to a contract software house in India or China for all we know.