If you click near the left and right borders of trackpad, then sometimes it works, sometimes not (it is mechanically blocked). I was also in Apple Store and the MacBooks there had same problem. So for me it's a manufacturing error. It's probably a design failure. Unexpected quality from such an expensive Apple device. I bought the MacBook in internet (not directly from Apple). You can easily reproduce it when clicking near left or right border of Trackpad, afterwards on opposite site. Problem doesn't (or less) occur on 13", but on 15" (latest MacBook Pro with Touch Bar). Am I the only one who noticed that? I hope Apple will replace those Trackpads in a repair program.