I have not noticed a pattern of posts here from users with this same problem, so I kinda doubt it is an issue with something in the OS that needs to be patched.
So that leaves two possibilities. Either you have a hardware defect, or you have installed some app or utility that is incompatible with Sierra that is causing the KP.
Try booting to
safe mode by holding the shift key at startup. That will stop all launch and startup items and any utilities and such from running. Does that fix it? If it does, that tells you it is something you have installed causing the problem.
Come back and let us know the results of the safe mode test.