Yes, there's no autofocus with Komplete Kontrol or Kontakt when in Reason 12. This is expected behaviour.
For Studio One, it should work when changing instances from the keyboard.
And S88 mk3 in Studio One.
Im not near my keyboard now so can’t try it, but I read that if you change Daw tracks from your keyboard it works as we want, it’s just when changing on the PC that it doesn’t. Which I find to be a big pain when I’m adding new tracks etc