New world spawn locations are sometimes located in a very dangerous place. I often create new worlds for mod development purposes, and find the Player located in very strange places, such as on top of trees, and the sides of mountains or ice peaks falling through powdered snow, and the like upon joining the world for the first time.

There was once I created a world, and instantly fell to my death in a Jungle Biome off of a tree or bamboo without any user input.

Steps to reproduce:

1. Create a world with the seed -6523629925161499028

If you need the world save, I can ZIP that up for you as well.