minecraft i died and items despawned instantly (before 5 minute timer

so i died (no dip lol) and some of my stufff did make it armour, sword, axe, my bow, but my diamond hoe with some great enchant ments (mending and fortune  i had found in a ancient city) and it just simply dissapeared for no reason along with a few picaxes i had and my brush FOR NO REASON it had not been 5 minutes either
imi seriously considering keep inventory just because of this glitch because its happened before withy my friends bow, and other items AGAIN before 5 minutes had pasted because my other items had in fact been on the ground still and not despawned