EOS R and RF85mm F2: Shutter Sync or Lens Problem?

[Nicshow]

I shot a basketball game tonight with my Canon R and the RF 85mm F2 and I got some weird, inconsistent issue. I tried removing a UV filter, changing the shooting modes and changing ISO to no effect. I'm stumped. Not every image had this aberration and the aberration is in a different place on most every image.

I used the camera body all day with another lens and had no issues.

I'd appreciate any help?

[Peter]

Flickering light source.

[Ron888]

Well spotted.How did i not think of that?

[jrhoffman75]