Entities warp everywhere upon reloading the world.

When the world is reloaded, entities glitch out of everything, and can teleport over quite a long distance.

Reasons this is not MCPE-1982 :
-It only happens in the latest snapshot
-The effects are far more severe
-It affects non-mob entities (e.g minecarts) too
-Some entities that didn't glitch out before now do.