BQ40Z80: CUVC flag during charge

Part Number: BQ40Z80

Hello,

I am trying to get a successful learning cycle with 7 cells in series and high capacity.

During a charge the CUVC flag occurs and the DSG Mosfet opens.

You can see it in the picture below where is a voltage drop/jump.

After disabling it I am still not able to reach an update status which is higher than 0x05.

Is this a normal behavior?

Best Regards,

Dan