Here is a video I saw on youtube, and the footage there I saw had a glitch on the movement shots.
and I had the same problem on my DSLR here is a shot from the video:
and here is the full video:
it's in 16:38 - 16:42
it's a couple of movment shots and there is this artifacts I also get on movement shots on my DSLR
I didn't have a shot that I took but it also happens to me on my shots.