I’ve seen some old threads on the Steam forums and here about this issue, and it’s still going on. The hunters cabin isn’t upgraded, and there is room in nearby food cellars, but the hunter simply isn’t taking carcasses from their home to the food storage and instead are just killing multiple deer and leaving them on the ground.
The hunter cabin’s meat storage is full. I have checked and the nearest smokehouse has room, and the nearest food storage cellar has room and absolutely zero meat. For some reason, whoever is supposed to transport the butchered animals to storage or the smokehouse is not doing it.
If this is a feature and not a bug because the laborers are busy transporting other things for a prolonged period, it would be cool if there were a way to prioritize pickup from particular production facilities.