LTC6811-1 not giving accurate voltage readings

I am able to read and write config register, read cell voltages and status register of LTC6811.

However, the cell voltages measured by LTC 6811-1 are not accurate and keep fluctuating.

I got around 6.2volt in cell 1 and all the remaining cells as 0 volt.

And after executing ADC command immediately for second time I am getting values of around 2 to 4.3 volts in cell 1,2,3,7,8 where cells are connected.

Cell (C) pins of LTC6811-1 are shorted if cells are not connected.

It seems like it takes some time for voltage reading to become constant but constant reading are 6.2volt in cell 1 and all the remaining cells as 0 volt.

what is wrong or has the IC got damaged?

Please give some solution.