For some reason, it seems that what appears to be a duplicate food item is created occasionally when a food item is grabbed by an ant. This item cannot be picked up, however, and vanishes after existing for a minute or two.
I determined this was what was happening since the glitch also occurs when a corpse is harvested, dropping a random food bit on the ground that cannot be grabbed.
It may be that what's happening is the ants are carrying the food, but not carrying the model with them for some reason, which fixes later. I haven't been able to spot any ants carrying air to food piles to know if this is the case.
This glitch does not seem to occur with corpses (devil's coach horse larvae and weevil larvae).
I determined this was what was happening since the glitch also occurs when a corpse is harvested, dropping a random food bit on the ground that cannot be grabbed.
It may be that what's happening is the ants are carrying the food, but not carrying the model with them for some reason, which fixes later. I haven't been able to spot any ants carrying air to food piles to know if this is the case.
This glitch does not seem to occur with corpses (devil's coach horse larvae and weevil larvae).