Most Items disappeared instantly after death

I was playing by myself in my survival world, was clearing out some land when I got distracted for only about 30 seconds, less than a minute for sure and when I turn around I'm dead, no biggie I was digging right around where my bed was, re spawned instantly went to go back to get my stuff but only found a shield and a few blocks or dirt and cobble, and thats it, expecting to pick up my full set of enchanted diamond tools, I was killed again, by a drowned zombie, went back again with a sword but none of my stuff was there, and stacks of spruce wood and stone bricks, enchanted diamond tools, all gone, there was no way I was away longer than 5 minutes for them to de-spawn, no fire, no lava, no explosion, not sure what happen has definitely set me back a bit. might be a update thing but I hope if this is a issue its a quick fix, thanks heaps love the game been playing since the beta