I didn't downgrade, all issues are in newest snapshot
I always use the same directory, the default directory
just loaded a backup and all my chest and inventory was cleared in my survival world
oops, sorry for reporting didn't realise i had my setting on fast, normally play on fancy,
i didn't have this issue again for any other snapshot after this one, and i am in pre release 3 for 1.8.1 and currently this bug isn't a bug anymore.