I didn't have that problem, but my I key was wonky, it functioned fine but the noise it made was very obviously different from all the others. I took it back and they gave me a new laptop and refunded a little money for the inconvenience.
Also, just today I returned my 13" non-TB for a 13" TB version and the spacebar on the new one sounds exactly like the rest of the keys, on my old one the touchbar sounded different, I just assumed it was supposed to sound hollow and cheap. If anyone experiences that and finds it as annoying as I did you should look into a replacement as well, this new spacebar sounds 100x better than the old one.