thick copper?
RE: Nächstes Projekt: Batteriespeicher für daheim
Could be wrong measurement or bad connection - I would monitor if always the same cells are showing the higher resistance.
All cells will reach the 4.1 - it is more about that the ones with less capacity - the BMS will have to compensate with balancing acitivity, as they otherwise would be "overcharged" - if your BMS get's hot even if cooled it looks like a lot balancing. Acceptable for the first few cycles but also to be monitored.