I encounter an error that is quite strange.
I get weird lines drawn on my cube faces… Those " lines" move with the orientation we look at the cube from.
That looks like the shadow bias for your light is too low. If you are using a movable directional light check if the bias is too close to 0. Your other problem is not an occlusion culling problem, it looks more like z fighting or an aliasing problem due to low resolution or duplicated faces in your geometry (its not clear in the screenshots). Have you tried to see if this happens when using immersive mode? (press F11 while in editor).
The shadow bias is at 0.5, the default value, I tried increasing to 1 without any result.
As for the lighting, it is coming from different point lights which are very far away in the world.
I tried the Immersive mode on your recommendation but it did not show any difference.
In fact, the further away I go from the blocks, the more the issue shows.
Here is what is happening when I get a away more progressively. I will post the image links directly so that you can see it in a better way:
You can see this sort of toothed line at the back of the cube. It is moving up and down when I move forward/backward and corresponds to the sort of lines seen in the first screenshots up there.
I don’t think that resolution is the issue either as I just tried it with Immersive without any more results.
I also tried with the three types of AA available without noticing any difference.
I just did end up in replacing all my config file at the exception of the DefaultInput one and it now seems to be gone. I could not say what caused it though.