Hello, Since I took delivery of the car last Thursday, I always have scheduled a charge for 3am. Using a Tesla's HP Wall Connector - but for some reason, when I woke up this morning to preheat - the car was not charged. I went to the car, and it was making some sort of Clicking noise.....by the charge port. I opened the front driver side door, and the car began to charge... i didn't do anything else.... What could be the issue???