BQ77910A Continuously current drain issue (balancing)

Dear all,

I´m running the BQ77910AEVM together with a Li-Ion battery pack which consists of 10 cells connected in series. I got one big issue: When I´m charging or discharging the pack a continuously current is drawn from cell no. 1 although this cell has the lowest voltage level of all cells. In my opinion this cell should be charged and not being discharged more and more in order to balance the cell voltages. Do you have an idea what the reason for that could be?

Thanks in advance J. Ries