have vague recollections of having seen House object clearing before, can't recall details ...
however, in situations where we've wanted what you seem to be wanting, in our case for auxiliary lighting devices (eg: shaving mirror light), we've defined the Relays as On/Off Load, type Lamp ... and connected their Turn Off connection to Room - On Unoccupied ... not had a problem, and imagine Delayed Unoccupied would work just as well ...
HTH
Chris