Hi, my new 2016 MBP's touchpad shows some strange behaviour. First of all, it bends when I press it firmly in the upper part. The middle part of it moves down for about 1mm. Is that the way it should work ? Second, and more annoying: from time to time, even when I just use tap-to-click (so that the touchpad doesn't move down or provide any force feedback), the touchpad does some strange clicking sound after a few seconds. This sound is emitted by itself, so there's no clicking involved by myself at all. It just happens after a few seconds. It's difficult to describe, but it's not the same sound when pressing it. Is this normal ?