ICM 20600 pitch false reading

Hi,
I’m calculating pitch at he ICM 20600 component.

i’m getting correct pitch value but when i’m taking a tight turn (the device remains with the same pitch) i get false readings (about +3 down to -19 degrees than the actual pitch).

configuration of accelerometer:
ICM20600_setAccScaleRange(RANGE_16G);
ICM20600_setAccOutputDataRate(ACC_RATE_1K_BW_5);
ICM20600_setAccAverageSample(ACC_AVERAGE_32);

what can i do to filter it/get correct readings?

Thank you in advance