Can confirm that there is an issue. All of the other sound effects seem to be fine it's just normal running that has, I think, the incorrect sound effect. As when I turned the sound up load it has the sound of normal footsteps, rather than the louder mechanical sounds.
Oh, crap, I didn't even notice but I just checked and can confirm. There's a noise when you initiate a sprint etc but once you're up and running there's no contextual footstepping sounds