What version of LR are you using when you see this banding? There was an issue with the D810 that was fixed with LR 5.7. Do only some of the profiles show the problem and others are ok, or are you seeing banding with all of them? If the latter, it could be some other problem.
It would be helpful to see a screenshot of what you're seeing, as well as have an example NEF that can be used to verify the issue with. You can copy-paste a screenshot directly into a forum message on the website, but to share an NEF you'd need to upload it to somewhere like www.dropbox.com and post a public download/share link, here..