Cube Orange with Hereflow and Here3 GPS

Hi there i had a good flight although the aircraft was not fully stable in altitude hold i associated with Hereflow.When in flight the copter was pitching back i had to control to put in one place.Can anybody analyse this log.Since i had connected Here 3 GPS also do i have put right parameters.
CanP1 and CanP2 to first driver
CanD1 and CanD2 to UAVCAN
FLOW_TYPE to UAVCAN
RNGFND to UAVCAN
https://drive.google.com/file/d/1YVSezllCCtEzBvTVmTgEQ9Q6tvcohA4J/view?usp=drivesdk

Did you configured and calibrated Hereflow ? Threre is wiki here:
https://ardupilot.org/copter/docs/common-optical-flow-sensors-landingpage.html

Yes i have gone through but i am no that expert in analysing the logs