Pixhawk Yaw Problem during a Auto Mission - 2

Hello,

As on this topic : http://diydrones.com/forum/topics/pixhawk-yaw-problem-during-a-auto-mission?xg_source=activity

I've got yaw drift problem during an auto mission. My hexacopter behave very well in Loiter mode that's why I'm lost.

Anyone encount

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