Done Died and then server crashed and rolled back my grave and lost all my items

Alright so i died in the deep dark by a cave spider when i thought it couldn't get me so i went afk and came back after a server crash logged in dead so i was like alright went back to get my grave and it wasn't there so now im mad at the fact i lost my stuff twice this happend about 15 mins ago here the proof that i died

 

have you tried looking around? above the bedrock even.
Sometimes graves spawn at wierd places if it cant spawn where you died

 

oh i didnt die in the nether i died in the deep dark and i did in fact dig around and i didnt find it

 

deep dark also has a bedrock layer at the top, though it think its at world hight so i dont think it could spawn up there

 

I mean idk