what could be the reason when the dji fly app can't properly assemble 360° spherical panoramic images, but the images always have some irregularities and I've tried with different dji drones mini 1 , mini 3 pro , air 3 and phones android and iPhone, now ipad 9 generation is used  , once mini 1 and litchi worked better and smoother.

what could be the reason when the dji fly app can't properly assemble 360° spherical panoramic images, but the images always have some irregularities and I've tried with different dji drones mini 1 , mini 3 pro , air 3 and phones android and iPhone, now ipad 9 generation is used  , once mini 1 and litchi worked better and smoother.