Skeleton loot (entities) disappear into hopper

I have a skeleton farm set up near a mob spawner. The skeletons flow onto a single space on top of a hopper. When killing them with a looting III sword, i can see certain loot drop (such as enchanted items or armor), and when it disappears i assume it is just being sucked up by the hopper. But checking the hopper along with the chest its connected to shows me that the item has disappeared from existence.

Perhaps since skeletons and dropped items are both entities, the entities are being deleted due to the "entity cramming limit", and are not getting sucked into the hopper fast enough.

Any help is appreciated, thank you 🙂