Why there are some yellow cubes dominating some opaque red cubes which are on the pareto front?
I’ve had the same issue. Not entirely sure but if I were to wager a guess, the “history” cubes are mapped to the domain of that generation. This would happen in a scenario where a new generation has results that are smaller (better) and thus changing the axis domain. This is totally a guess, but it makes it difficult to analyze the information from the optimization.