BQ27421-G1: BQ27421 terminate voltage higher than setting

Hi

The Terminate voltage is set to 3.3V. After several cycles of learning, it is found that the terminate voltage is getting higher and higher.

The first discharge cut-off voltage is 3.353V, SOC=1%, RM=0mAH;

The second round is 3.382V, SOC=2%, RM=0mAH;

The third round is 3.424V, SOC=2%, RM=0mAH;

The third round is 3.458V, SOC=1%, RM=0mAH;

After multiple rounds, the discharge cut-off voltage is 3.499V, SOC=1%, RM=0mAH

The Max Delta Voltage is 20mV, the RA table as below:

Why the terminate voltage is getting higher and higher?

Waiting for your reply.

Thanks

Star