I got this message after pluging into a non-functioning charging station. Somehow the plug was not working but I left it there anyway and got that message after I returned and started the car. I then drove the car home and the next time I started the vehicle the message was gone. Plugged it in to my home charging station overnight and the car was fully charged since. The message hasn't came back. Any ideas? Should I be concerned? Went to service and they said to come back if message return.