So I made a post about this a while back breaking down the technical details and why CarPlay craps out a lot (usually at start of truck) and in certain areas. But to sum it up, it’s partly due to the protocol CarPlay uses to connected wirelessly.
When your phone connects to your car via wireless CarPlay it is not actually connecting via Bluetooth but by a 5Ghz band (this is what most wifi routers use today). Due to the congested nature of 5Ghz and it’s relatively low strength in terms of range compared to 2.4Ghz, I believe the signal that the raptor send out to your iPhone to connect gets interrupted by other signals. I’ve noticed that if I start my raptor near an airport and try to have it connect to my iPhone via CarPlay, it will simply fail to do it until I get far enough away (usually requires a cold restart of the vehicle, everything off and on again).
I’ve noticed the same issue near other areas of heavy 5Ghz (certain antennas and apartment complexes). Overall the issue is so sporadic that I can’t pinpoint the reason without proper debugging tools that only ford has access to.
So to put it plain and simple, your forscan mod likely did not cause the issue to start, I’ve had it happen from day one without any forscan. It’s weird too because if you try to plug in via usb for CarPlay, that often won’t fix it either. I’ve also noticed on the screen it says CarPlay is disabled and sometimes it can’t re-enable is unless I cold restart otherwise I get an infinite loading screen to enable it.
Hopefully ford finds a solution to this soon because it’s super annoying, at the minimum they could distinguish connecting via cable va wireless for CarPlay since it seems the vehicle tries to auto detect but use wireless first if it thinks it can (even if wireless is not working like mentioned above).