My two iPhones have never worked properly with my 3. My brand new iPhone XS Max, for example, will fail to hands-free unlock the car most of the time. The odd thing is, however, that once I take the phone out of my pocket (waking up the screen) the car immediately unlocks. I don't have to unlock the phone, just engage its motion sensor. It's as if there is a low power key mode which fails on the Model 3, but the high power mode succeeds. I suspect an issue with the car's Bluetooth module. Has anyone else encountered this issue? Service is stumped.