@WTFDproject @RkamilC It looks OK 
I have install 1.39.6 firmware for the gimbal, and i fly 20 minutes without problem ! No horizon or IMU problem ! I hope to fly more tomorrow but this horizon problem looks to be a incompatibility with the new firmware. It's very strange because a lot of people send back their e90 to Yuneec to repair and they said that the imu was changed... Now i'd like to found the changelog between the both firmware to know the evolution.
I hope the next tests will be ok now! Thanks a lot for all people who helped me

I have install 1.39.6 firmware for the gimbal, and i fly 20 minutes without problem ! No horizon or IMU problem ! I hope to fly more tomorrow but this horizon problem looks to be a incompatibility with the new firmware. It's very strange because a lot of people send back their e90 to Yuneec to repair and they said that the imu was changed... Now i'd like to found the changelog between the both firmware to know the evolution.
I hope the next tests will be ok now! Thanks a lot for all people who helped me
