Honestly, I think it has to do with high round count guns activating the BHO much more frequently than what is was intended for. It activates every 5 rounds instead of 30 and it is just a thin piece of stamped sheet metal that takes the impact of the bolt. It is easily changed so it is almost a non issue but that would be my guess as to why both of my rifles did that.
Interesting, I wonder if the same problem exists for the x95.