Infinite flat terrain generation corrupted in python 3 with pyglet

[Qboi123]

Sectors are 16x16 with unlimited height (I will limit height but this is for now)

Note: The sectors are created but not generated.
My goal is to generate infinite flat terrain (without multi threading). But the terrain won't generate correctly.

I needed to put a link because i can't show only the world generation code (that's already big enough).

I think it can be possible that it's not only the world generation that causes world glitches.

See file for full code

Please help me