[MC-58902] Chests empty

What I expected to happen was my chests having the items in there I left there.
What actually happened was I found my chests completely empty

Steps to Reproduce:
I Updated from snapshot 25b to 26A

Linked issues

Dlawso the Really Lucky Rabbit 2014-06-25T14:45:35Z

The only way that's possible is downgrading, which is not supported. MC-45009

Cannot reproduce, all inventories I checked are fine (chests, furnaces, hoppers, etc).

I also was using w25b before.