Color banding issues with brand new R6 Mark II

[rcphoto85]

I work for a clothing company as their full-time photographer/retoucher, and am having issues with the new Canon R6 Mark II camera we recently acquired. I'm getting this awful color banding in my images and it's better or worse depending on the amount of fine detail in the clothing. Shooting RAW format, Adobe RGB. See example below.

Prior to this, was using a Canon 5D Mark III for several years and never had this issue. Any ideas? Is this something I can correct in camera settings or? Thanks

[Peter]

Moiré. Changing the distance will help. At f/16 diffraction may help.

The AA filter is different between your 5D III and R6 II. It is like going from 5Ds to 5DsR.

[Tronhard]

I expect Peter is correct.  You may also be able to change the moiré issue by changing your magnification and distance to the clothing to change the relative interference pattern to the camera sensor's photosite pitch.

[Waddizzle]

I am going to tell you to ignore it.  ‘

The image seems like a moderate crop, not the full size image.  Not unless you are making poster prints to go on a wall in a store or something similar, I would ignore it.  If the images will be used online in an online store, then definitely ignore it.  

[p4pictures]

Fabric texture and sharp lenses are the achilles heal of the EOS R6 and EOS R6 Mark II, moiré will be a problem. Personally I saw it much worse with EOS R6 than with EOS R6 Mark II. I actually found my EOS R6 was less of a problem when using the old EF 85mm f/1.8 USM lens than using the RF 85mm F2 Macro IS STM lens due to the different sharpness of the two lenses.