Did I read somewhere that sometimes you have to "wake up" the key fob by shaking it before it will connect with the car?
I have not experienced that?
Does the keyfob allow unlock charger cable?
As long as the car is 'awake' it should allow you to remove the charger if you have the fob in your pocket, sometimes you need to touch the rear door handle to wake the car up or even open and close that door.