Problem about heading information

1

Hi, all

During flight, I found some problem about heading information.

below like figure, a drone (blue) is working well, however a drone (red) turns around around when arriving destination.

스크린샷, 2016-08-30 13:03:00.png1920×1080 295 KB

I think that it is problem about heading information.

I use attitude_estimator_q and using ver 1.2.0

Thanks in advance

STMOON

p.s.
I attach mag and gyro information when not working.