Did you do anything magickal in that area, any ritual, any evocation etc ?.
If so I’ve heard stories of spirits passing through the room and seeing their favourite type of food and feast on it.
Of course normally food had to be offered, they drain the food of its vitamins, nutrients and energy.
However there are some instances and some spirits that can just take the food, but the spirit must be at a high presence of manifestation.
Djinns are known for doing this alot, that’s why many Muslims say a short Arabic prayer before even taking a sip from a glass before the Djinn try and feast with them.
I’ve had the food mold quickly when the spirit feasts on it, through me giving offerings.
Theoretically if certain foods are left in ritual areas this could happen too.