Model 3 idle > sleep at home takes 2:05h

Strange things going on with my model 3.

On every other location then home my car goes to sleep after 15 minutes

When i am at home it takes always more then 2h. To be precisely 2:05m<>2:07m

Sentry is off, no wake up by apps, no charger connected.

Why o why refuse my tesla to sleep faster at home? Cost me every idle > sleep cycle a 0.5KWH drain