I just got the weirdest response from Sony about the banding issue. It's the first tier for a solution:
"Thank you for contacting the Sony Alpha Email Response Team.
I understand that there is banding issue when using S-log 3 with your ILCE7SM2 camera. And I apologize for the inconvenience that this may have caused you.
To avoid the banding issue, please try to increase the shutter speed. If the issue still unresolved, please contact our next level of support for further assistance."
There are banding issues in the link you provided above. I saw in 2 shots, and I am using my iPad. If I get on calibrated/bigger monitors, I may find others.
Are people in this thread, who are affected by the banding issues, contacting Sony about a solution? I'm about to send them a response with my experience.
Just got mine 3 weeks ago. Footage was shot all in shade. Talent in the foreground. Concrete in the background and I was getting rainbow shape banding.