I've had a bug for years where my Komplete Kontrol S49's midi controllers does not work properly with Kontakt (6 or 7) in Studio one. Basically, while Kontakt can see the keyboard keys and use them in the midi input, outside of the modwheels and sustain pedal, no other MIDI control is seen by Kontakt in Studio One.
This is a documented bug (KT-8482) that has been verified. I was hoping that there has been some resolution on this issue. Thanks.