M95 mouse button # 13 feels squishy?

[The Five Solas]

I just received my m95 today and so far I'm loving it. I'm pretty new to PC gaming and have never really had any experience with any gaming mice. My question is that all of the mouse buttons seem to have a nice "snap" to them for lack of a different word with the exception to mouse button number 13 which is located directly below the profile led lights. I don't know how else to describe it other than it feels squishy and doesn't have the same pop back feels as the other buttons. Just curious if this is the way it's supposed to feel or if it's a manufacturing defect and it needs to be returned.