bq34z100 JEITA compliance and Management Data Register (ChargeVoltage & ChargeCurrent)?

For JEITA Compliance setting (T1,T2,T3,T4 ) of bq34z100,  i set the JEITA to be :

My gg'sFile Setting :

JEITA T1 = 0   (C)
JEITA T2 = 10 (C)
JEITA T3 = 45 (C)
JEITA T4 = 55 (C)

When Battery Pack is Operating Temperature at -15C with bq34z100 ,

We find the Remaining Capacity() and FullchargeCapacity is not stable or Changed suddenly .

Voltage()              { Command Code : 0x08/0x09 } =Ok

AverageCurrent() { Command Code : 0x08/0x09 } =Ok

RemainingCapacity() {  Command Code : 0x04/0x05 } = Change suddenly

FullchargeCapacity() { Command Code : 0x06/0x07 } = change suddenly

Do you know bq34z100 how to manage JEITA registers vs Internal register ?

Thks,

Leung