I've had this problem all of the sudden after getting a software update during the 25k service last month. The iPhone issue is fixed, it always connects now. I've only used DC fast chargers a couple times since then, and the Electrify America chargers always seem to be a problem. Yesterday, I messed around for about half an hour plugging and unplugging, getting EVSE fault messages every time. I tried starting up the charger before plugging in, and it finally worked. I had used ChargePoint a couple times and they worked, but their system makes me start the unit before plugging in. Maybe this is the key, but only time will tell. I never had a problem charging in the two years before this update.