BQ34Z100-G1: LiFePo accuracy

Hi,

using the BQ34z100-G1, I see huge jumps on SoC, after a charge cycle (from 25% to 60%, unplugg, let it rest for 12h, then it shows like 92% SoC).

I also discovered that during charging, the BQ returns 0V.

Any idea?

Thanks

Christian