I'm pretty sure the car doesn't get any over the air updates, so if something changed it probably wasn't on the car.
I've had phantom calls on my console when connections get dropped between my phone and system. (The console keeps ringing and ringing and ringing... even when my phone is idle.) I have to pull over and reboot the car to make it stop.) But, this sounds different.
Maybe its from and update you got on your phone. I'd first try deleting your phone from the bluetooth and then re-adding it.
I've had phantom calls on my console when connections get dropped between my phone and system. (The console keeps ringing and ringing and ringing... even when my phone is idle.) I have to pull over and reboot the car to make it stop.) But, this sounds different.
Maybe its from and update you got on your phone. I'd first try deleting your phone from the bluetooth and then re-adding it.