phantom drain question

2021 MY LR.   Three and one half years old.   Starting a few weeks ago, I've noticed that the car, in my garage, on the Tesla Wall connector @ 48 amps, charges to the limit I've set.  Usually 70%.   Sentry mode is off.  Climate control is off.

Car charges to the set limit.  TesliFi shows that.  Then in the early morning, with an hour (approx.) it drops six to eight percent.  The car is not moving.  Still plugged into the wall connector.  Climate is off.    Windows are closed.  Sentry is off.

This is not happening every day; perhaps twice a week for a month.   It adds up to a lot of lost charge.   I've read through the posts here and don't see a similar situation.   Appreciate thoughts from the community.  Thank you.