Current sensor reading drops above 50% throttle


i have a holybro kakute F4 FC with arduplane 4.0.5, and i configured the voltage/current parameters as per documentation below. i am facing a strange issue where the current reading increases with throttle till throttle reaches somewhere around 50%, then as i increase the throttle beyond 50% the current reading starts to drop. Any idea what might be the cause ? Thanks

  • [BATT_VOLT_PIN] 13
  • [BATT_CURR_PIN] 12
  • [BATT_VOLT_MULT] 10.1
  • [BATT_AMP_PERVLT] 17.0