Things disappear extremely quickly.

So, I was playing minecraft windows 10 edition. I ran home when night fell. The phantoms came and killed me. I quickly started running to the place of death, ignoring skeletons, zombies, spiders and creepers. When I reached my place of death, the things were no longer there. Although I got there very quickly. I had a lot of things and didn't even have any experience! Things disappeared extremely quickly! And I had chain mail armor, a treasure dug up!

I died at coordinates about 294 on x and 1277 on y. I get there and things are gone.

I can upload a video (Only it is in Russian).
There the phantom killed me and then I come there.