PC 7 days to die alpha 19.1 b8 Navezgane chunk/biome error

[Jony_Dick82]

Edit: I just remove whole game, reinstall, and it works fine

Hi folks, I have this problem from alpha 19 Navezgane only, the game begins below ground and even if I get up the chunks/biome disappeared but only the one I started in, thank for any advice...