Be sure that the IMU Calibration is done correct. After that do the doing following steps: 1:In DJI Pilot APP go to the Gimbal Param Settings 2:Then sellect the Gimbal Auto Calibration button then oke. 3:Ater that close the Gimabal Para Settings screen at ones when the calibration begin. With that X mark on top right corner. When i let the Gimbal Para Settings screen open till the calibration was ready i always get an Tilt horizon. When i close the screen fast, its always fine i tested this allot of times and it seem to work for me Let me know when this will also work for you.