In contrast to the favorable trends observed for HFSP configurations, those derived from Sella and IRC configurations exhibit greater diversity and show slow yet consistent improvements over the seven training iterations. Specifically, several additional iterations are needed to reduce the outliers at higher ϵ t values to below 1.0 eV/Å for the Sella trajectories. A detailed investigation into this issue reveals that some configurations remain challenging to describe, even with the DP 7 model. These problematic configurations often arise from unphysical HFSP guesses, which can persist during the training protocol. Recently, overcoming this issue has been explored using improved HFSP algorithms to obtain more accurate TS guesses. After seven training iterations, the DP 7 model generated valid MLP/TS's for 51 of the 53 reactions. While transition states for two reactions (i.e., reaction 19 and 53) were not obtained using DP 7 , surprisingly, we found that previous model iterations were successful for these two cases. Furthermore, four reactions (Rxns 8, 12, 19, 27) failed at the DFTrefinement step, representing 10% failure rate across the entire workflow. The underlying cause for these failed reactions are discussed later.