I have turned "Hey Siri" back on to see if issues come back, and I added to 'AdGuard Pro' to not use VPN rules when connected to the wifi that CarPlay is using. To this end though, this reminds me of a similar problem I had in the early days of using the Alpine ILX-107, a couple of users had it, and it seemed to be related to the iPhones that were using Intel modems (used for both cellular and wifi), now-a-days all the new iPhones use Intel (2020 is supposed to be QualComm again) ... anyways, we found out that if we turned off LTE for the drive, we had no audio drops, (so just using 3G or lower)
Some of the similarities are: when you brought the phone closer to the unit it would not fail. Using products that didn't have Intel modems worked (older iPhones, and in Thorissr case Samsung is using QualComm). Since I have a hard time getting the problem to happen, anyone will consistent failures, can you turn turning off LTE during one of your drives and see if you get audio drops?

