Twice in the past ten years I discovered hundreds of frozen dead or nearly dead ants in my freezer. Not a single one in the fridge side which was full of meat and sweet fruit. But hundreds of dead ones in the freezer.
Both times I never figured out how they got in, and the problem solved itself in one day. Everything in the freezer was bagged or wrapped in plastic, and they did not even appear to be going for anything in particular. Just hanging out and freezing to death on the bottom half of a side by size freezer.