When Power Factor is changed, Current is changed in STPM34,STM32

[Gyeongil-Kim]

I use STM32 and STPM34. When the power factor load is changed , Current is changed about 1% in Metering..

Current increased in Lagging load.

Current is decreased in leading load.

The change is so small that I can't check current change in analog...

I wanna current is not changed. Can you help me..?