So i Wanted To Try The New SnapShot And My world Is All bugged out And its Doing this

Put the summary of the bug you're having here

What I expected to happen was...:
I Was Going To Try The New Snapshot

What actually happened was...:
it bugged out when i joined and i spawned in two biomes that were on top of each other and it did that

Steps to Reproduce:
1. Spawned in a world?
2. Looked Around Saw The Bug
3. Press E To Try New Items And Mobs Inventory Armour And Players Were Bugged