BMS or Battery faulty?

Hello!
I can’t figure out where the problem is.
After charging the board i checked my bms and this was the problem. Group 6 and 7 is off. After unplugging and had a little with no load it pounces back to normal. And i tried repeating it happend again it’s off balance and again spinning it pounces back. I tried to charge it after it was balanced again and it charged competely normally as it should ( slowly balacing ect ) till 50.40 and stopped.

Any idea what might be problem?
Thanks for advance!



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