When I took some footage yesterday I noticed four circular artefacts had appeared in the shots, which look like little flying saucers, though I'm pretty sure they aren't. You can see them at at the top of the screen in both photos and videos. I had been using a circular polariser and I thought that might be the cause so I removed it and took some test shots after cleaning the lens. This didn't make any difference. The circles remain static at the top even when the gimbal can be seen moving up or down in the video. It also doesn't appear to have been caused by the bright weather yesterday as I took some more test shots indoors and they're still there I suspect it might be marks on the sensor, mind you, how they got there is anyone's guess. The only difference to my usual procedure was that yesterday I used Litchi for the first time. For today's test shots I was back to using DJI Go4 again and the circles are still there. I might have inadvertently made a change to camera settings in Litchi that the Mavic has retained but for the life of me I can't think what. I've posted a photo in the hope that someone can suggest a self-fix, if that's possible, or point me in the direction of a UK repairer. Any ideas you experts can give would be greatly appreciated.
