I could be wrong, but we've been breeding corns for a number of years now, as well as other snakes & have experienced sperm retention & snakes dropping eggs, but never a snake just 'laying' a clutch of totally unfertilised eggs in the way that you are describing.
I got a clutch of unfertilised eggs, yearling female, never been near a male corn (at least not since she hatched alongside her brothers and sisters), I found a yellow egg in her enclosure one day. Rang the reptile haven, they said to put a nest box in with her, she sent straight into it, came downstairs a week later, four-five eggs in the nest box.