Inspiron 7577 key knocking

I recently received my long-anticipated new Inspiron 7577. I noticed that the F2 key produces an annoying knocking sound when struck, as though it were hitting some hollow space underneath it. The 2 key right below it also produces this sound, albeit to a lesser degree. No other key produces this knocking, annoying sound. Though there are slight nuances between them, the remaining keys only produce a very acceptable, light clicking sound. They do not produce a sound as though someone were knocking on the door.

I wonder if anyone else is experiencing this with this recently released model, and whether or not this would be considered a defect (I personally do).