CCS/BQ78412: SOC jumps at high and low temperatures

Tool/software: Code Composer Studio

Dear,

I contacted the Customer support center and they advised me to post my question to this form.

The problem I'm encountering is that the SOC jumps suddenly from 68% to 0% SOC for low temperatures and during charging at high temperature (50°C) jumps from 0% to 30% . I tested with different bq78412 chips and see the same behaviour at high (+50°C) and low temperatures (-15°C). The SOC curve is linear for temperatures between the 15-25°C so I see the strange behaviour only at extreme low/high temperatures. How can I resolve this problem