there are two problems found. Images are going to be added.

What I expected to happen was...:
The mountain or hill you could see under it as if missing lineup with ground. Plants should look on the ground but do look hovering over the ground.

What actually happened was...:
just by one block down the mountain or hill looks like it is hovering over the ground but you can see under it like an xray.

Steps to Reproduce:
1. The seed is 4781903876114633872. At spawn you can see most of the problems.
2. Images added shows XYZ of locations in question.
3. Sand area you can see also shows this same problem.