Same problem here with my 13 inch touch bar, very annoying
I even got different sounds from the same keys, for example when pressing Q, W or E on the bottom of the key they sound very "clicky", the keys next to them don't. When I normal press then in the middle or top they sound like they should sound (low or hollow sound).
A, S, D and F do the same and even the whole last row from ~ till /
The keyboard itself is nice (still prefering my old 2012 air tho), but I want all keys sound and feel the same, this is not workable and very distracting when typing a lot.
A friend who has the 15 inch does NOT have this problem so that's why I am returning mine and maybe order a 15 inch as well.