Of course, skin has oil and anytime you press a glossy button it will temporarily stick and move with your skin. It will happen to all Touch ID buttons, if not at first then later. The only solution isn't ready yet.
I'm just saying that my first MacBook Touch ID was definitely loose and my new one is not. If it happens later (not sure it will?) fair enough. But if I'm forking out >£3k for my MacBook, I should be happy. And now I am