So i was "mining" up a big biome of podzol, and when i was returning to leave it at home my screen went black and a message about some "momentus" apeared, then i respawned and in the chat said i suffocated in a wall. When i went back to where i died nothing was there, i lost 18 stacks of Podzol and a Unbreaking 3, Eficiency 5, Silk touch diamond shovel; what can I do? What was I supposed to do? Thx and sorry for my bad English, Im not native. :/
First, make sure you're at the correct coordinates. You can view your recent death locations with the command /deathlog true. Check the area above the coordinates you died at. Items stuck in a wall can sometimes float to the surface. If that doesn't work, and you can't find your items, then unfortunately there's nothing you can do.
i have a reference building next to it and there is nothing, i just want to know if when you die your things instantly despawn or just a bug that happened to me :/
They normally despawn after 15 minutes (See http://empireminecraft.com/threads/quality-of-life-part-2-survival-1-17-16.61196/) The last bullet says: Reminder that item despawn is 15 minutes of ACTIVE time. It also says item pickup by other players is prevented for 8 minutes. I'd check with staff if you had something else, maybe a bug?