Tesla Motors Club

I've had my Model Y AWD LR for a few weeks now. When I park it in the garage, even after a short trip, something under the fronk keeps running. Sometimes for hours (literally). And sometimes when I go into the garage many hours later (or next day) something under the fronk wakes up.

Some details:
1-Doors are closed and the temperature monitoring feature to keep the car cool (can't remember the exact name) is turned off.
2-Screen is NOT active when the fan keeps running, nor when we go into the garage the next day and whatever makes noise under the fronk wakes up.
3-It is not plugged in.
4-Sentry mode is turned off at home.
5-It does this even when my phone app is OFF, or even when I don't have my phone with me.
6-Temperature around here has been hot - 90's outside, 80-90F in the garage.
7-It isn't trying to run the AC - at least not to cool the inside of the car.
8-I don't seem to be losing miles overnight

I know it will cool the battery after a trip, but something keeps going for hours even after a 2-3 mile trip.

My wife just went into the garage and a fan was running (low level). Car hasn't been used in 2 days. Temp in the garage is 75F. She didn't have her phone or key card on her. Her phone was in the bedroom (40-50' away) and the app was not even on in background.

Does anyone know what's going on? After a few hours there shouldn't be anything that needs to run or be cooled off.