1DX II image artifacts

Have about 9000 frames on my 1DX II and this is the first I have noticed of this.

I have about 30 consecutive frames from a recent event in which these artifacts show up. All shot in RAW. Artifacts appear in the images on both the CFast card and CF card.

Artifacts are always around the edge of an object with strong backlighting as shown here.

Here are a couple of 100% or so crops illustrating the problem.

Anybody seen anything like this before?

Hummmm?
Never see this.

Happens in RAW in CFast & CF.

Always on the left hand side of the picture?

How about JPG?

More discussion at: http://www.fredmiranda​.com/forum/topic/14401​53