I've seen posts about it working with Komplete software, but nothing about the keyboard. NI takes forever to update their compatibility list. Is it working for you?
Apparently Sequoia is working fine with the MK1 keyboards so I can not imagine thee being a problem as such with the MK2 keyboards then.
Also there is a S-Series MK2 discussion here involving Sequoia and apparently then even if this user has a particular problem then it works.
Thank you.