When Model 3 is stopped, Vehicle Hold can continue to apply the brakes even after you remove your foot from the brake pedal.
To disengage Vehicle Hold, press the accelerator pedal or press and release the brake pedal.
Shifting into Neutral also disengages Vehicle Hold.
After actively braking Model 3 for approximately ten minutes, Model 3 shifts into Park and Vehicle Hold cancels. Model 3 also shifts into Park if it detects that the driver has left the vehicle.