hello guys.

I'm currently running A3 systems on 6-rotor payload drone.
it had been flying very good and accurate in GPS mode until doing the firmware upgrade from 1.7.5.0 to 1.7.7.0.
hovering is fine. when I input elevator forward, the drone begins following visibly curved track (about 15-30 degrees to the right).
feel like it's misunderstanding its heading, however, there are no error signals or events in logs so I can't identify any causes.
compass calibration seems make it better but it's temporally. I have to do that whenever turn on the power otherwise getting the problems.
Although I have experienced similar cases while using 1.7.5.0 few times, it was not that remarkable.

I made no changes to DJI Assistant settings and hardware of course.
anyone felt strange about the flights since upgrade?
I've found there might be some differences in the way IMU calculating attitudes by reading flight logs but I have no idea how it affects at all.

how can I solve this without downgrading firmware?
is changing mounting values good?

Sorry for the trouble with the flight controller, we will report it to our engieers for further analysis and keep you updated. Thanks for your feedback.