I assume you have ruled a shed out.
How is it's hide situation? Plenty of tight hides? Plenty of privacy?
I know my milksnake neeeeeds it's privacy. Typtically I will have to leave it's meal infront of it's hide and shut it's cage. Sometimes even drape a trashbag over the glass front to give abit more seclusion. Of course I feed f/t you know as well as I do you couldn't do that with live.
It's just odd that that would happen with no real changes? Granted I don't own a corn but there eating habits aren't drastically different from Lampropethis I don't think.