Unrendered spots, biomes, trees (NOT UNRENDERED CHUNKS)

What I expected to happen was...:
A normal rendered world without any problems.

What actually happened was...:
Trees are rendered for half, the world like snow biomes aren't good rendered. The snow doenst render in the snow biomes.

Steps to Reproduce:
1. Create a new survival world
2. Let the world render and walk away from the spawn
3. Walk further away and then you'll see that sometimes things doesnt get rendered and you'll get stuck in some unrendered spots.
4. When you exit the world and come back, then it gets rendered and you'll see everything fine.