We have a 2020 model S and a Tesla branded WC. For several years it charged in the middle of the night as scheduled..In the last 30-45 days the car will no longer start charging. I tried to start on the mobile app but that failed as well. I unplugged WC rebooted car, plugged wc back in and it worked until it reached desired charge level. When it was time to top off the battery it again failed. Any suggestions? Tesla service has not been helpful. Also, I lose about 2% charge per 24 hour period with sentry mode off. Is that normal?