Yup mine does the same thing. There was a thread on this on what to and not to do about it, can't remember but I was quite pissed and then once I read through the post it didn't seem like it was going to affect anything other than be annoying if you were on a stealth night mission or something so I quite worrying about it.
Its in the forums someplace. You could also ask the forum sponsor here who is the importer, they seem to know everything about the XCR (seriously, called them about my bolt catch and they had the problem totally sussed and fixed in minutes).