Lost altitude in Loiter mode and observe the Innovation POSZ EK3[0].IPD getting stuck

FCU : Mateksys H743

EK3_SRC1_POSXY → GPS
EK3_SRC1_POSZ → Baro
EK3_SRC1_VELZ → None
EK3_SRC1_VELXY → None
EK3_SRC1_YAW → Compass

EK3_ALT_M_NSE → 2.0 (default)
EK3_ACC_P_NSE->0.35 (default)

Drone in Loiter mode loses altitude significantly from 15m to 5m, I dont know the root cause why EK3 not trust the baro and found EK3[0].IPD get stuck.

This is my log.

Thank you

EKF[0].IPD = -0.5, What something wrong?