It is automatic, and never fails, you leave when the body dies. There has never been a case of a dead person remaining in the body.
All of science both denys the soul, and says energy cannot be destroyed.
A battery that went dead in an instant, who would say the charge ceased to exist? Shorted, grounded, those electrons went somewhere.
Laid on a rubber sheet the charge would stay, it does not happen, nothing flows to ground, and the human brain is about 5 Watt, enough energy to send a radio signal to Australia.
There is more going on than we can see, deeper than we can understand, but we all get to go for the ride.