The culling feature, that is supposed to hide chunks that are not visible to the player, breaks in very long caves.

As you can see in the attached video, some blocks, that normally are visible, are incorrectly hidden by the culling system.

To see this side effect you can use this seed and coords:

Seed: 8299482064469380231
Coords: 1085 76 807
Coords: 1152 73 762