Doorbell retrigger time delay between events

Hi, does anyone know what the retrigger time is between events (i.e. detectinh motion)?

For example, in either Surveillance mode, the doorbell will trigger a motion event when a car pulls into the drive, but when the car stops, the recording stops, and never seems to retrigger a new motion event when the person gets out the car and walks to the door! This seems like a bug to me, unless I’m doing something wrong.