Micro Four Thirds lenses have profiles embedded into them, which certain software (like Lightroom) uses to render images, fix distortion, etc. It could be that the software you are using isn't applying this profile properly.
Also, if you are shooting raw, try JPG and see if that makes a difference. I believe that the DJI camera will apply the profile when creating a JPG.
I had the Inspire 1 on the ground and switched from video to camera and that is when the images become very distorted in the dji go app. The video part worked. The distortion is something that was more than I have ever seen from geometric distortion from a lens. I was shooting a raw images but will try a jpeg. But I wanted the raw obviously for post processing.