AC200MAX charging at 99%

Hi all! I just got my battery and run it through few cycles. I noticed that charging process is a bit strange: when the battery reached 99% the charger pulled-in 430-450W. After 30 minutes the battery was still at 99% and the charger still pulled-in 430-450W. When I disconnected the charger and restarted the battery it displayed 100% (it was charged with no load). Is it normal? I’m afraid that BMS may overcharge cells and battery will die much faster then I would expect

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