I don't know if it is the elbow hinge or not. But I just can't get mine to unclip in the first place. It won't budge at all. I tried again just now, and its "deforming" the plastic when I try to bend it. Not comfortable putting any more pressure than that on it.

I haven't seen it mentioned in any reviews - which if it was a design thing it would be on almost everyone's UW Dev.