Voxel chunks not spawning well

Hello guys,
I’ve been following a challenge by Tefel which you can find here

But I encountered a problem which I can’t solve, every chunk is generating well until I try to use noise or chomp chunk at Z axis with

chunkFields[index] = (z < 30 + noise[x + y * chunkLineElements]) ? 1 : 0;

In tutorial/challenge the prodecularmesh generate chunks over noise and it looks like this

In my project it looks like this

Here is my code of VoxelActor.h and .cpp

If anyone know what can be cause of this or how I can fix it then I would be grateful

I wanted to try it, but the tutorial involved a plugin that throw a million errors, so im curious how you even got that far