Our analysis of the official results showed the main issue was normalization.
we performed a manifold of new experiments, using the same configuration as in run AE, but applying other normalization strategies: (a) z-score normalization, but ignoring the FNWN dataset (given its shift through low values); (b) z-score normalization, but considering independent means and standard deviations for each test dataset; and (c) without normalizing any of dataset (including the regressor one).