Items Disappeared From chest

I am facing a bug from a long time in my survival world one day when i was gone for mining when i come my 64 iron in chest was disappeared, After too much time i finally got a trident i fully enchanted it, I have it in my hand then i closed the game when i opened the game trident was not in my hand and also not in my inventory,Today i got elytra first time in survival because i am a new player then i enchanted it and put it in my chest after 7-8 in game days i come to get my elytra it wasn't there😭😭Please solve this Bug.