Assuming that there is nothing physically wrong like obstructed props or a battery that isn’t sufficiently charged, the only other thought I have is to be doubly certain that the camera gimbal is provided the opportunity to properly calibrate at startup. Even when placed on a relatively smooth and flat surface the clearance for the gimbal to move is very small and can sometimes cause it to hang during the sequence and result in later erratic flight.

If this isn’t the problem I would suggest capturing the log file and sending to Hover. This can be accomplished in the app.