Super Soco TS (26Ah) Battery fault finding.

Taking apart a TS 26Ah battery and trying to find the reason it fails very often. There was a poor contact that led to a connection blade to overheat. The BMS balance cable connected to that row would show less or no voltage. Finally the BMS would cut power due to imbalance of cells. BMS was replaced by the dealership but obviously for no reason. They did not bother to look at the pack.