Loot Despawning Instantly

[DatAsianYeKnow]

I know you shouldn't bring a lot of your valuable stuff when adventuring out but I was out to get some wood right outside my house and I died to a mob, shortly after I died I quickly came back just for my loot to despawn right in front of me. It happened again after I was helping my friend attack a bunch of skeletons outside of our base. I'm not sure if this is a bug or it's design to despawn our loot in a few seconds but if it is a bug please fix it.