I've been testing out the camera and recording out to ProRes via 3G SDI in the 3G RGB 444 S-Log mode. I've tried changing the settings, going out from the other SDI out, using the 1.5G YCbCr 422 setting, changing the PsF to 59.94i for pull-down, but nothing has changed this.
The artifact is much more noticeable when it appears at hard edges between bright and dark—in the images, you'll notice it appears either black, green, or "cyan". It doesn't seem to go away, which is a pity because it is a very noticeable "digital" artifact in an otherwise strong image—with the acceptation of a bit of colored aliasing appearing on certain patterns.
I'm going to have to assume that this is what the camera is like and that there isn't a way to avoid it, but I wanted to seek confirmation on the matter from other F3 users on this forum.
Here are some still images including the artifacts—all are, with one exception, “graded” from the S-Log, and therefore making the artifact more noticeable:
https://images2.imgbox.com/61/76/yC6p69Ur_o.png
https://images2.imgbox.com/cf/1a/ol6AkhUj_o.png
https://images2.imgbox.com/4e/31/UKgHWDR2_o.png
https://images2.imgbox.com/b0/ea/XHeIRzlc_o.png
https://images2.imgbox.com/40/63/8PXd9KCn_o.png