I have the Cinnamon Bone Copperhead and have carried it since July and have not noticed this. However, given that the covers are supposed to be bone, one assumes that the coloring is not natural, and the coloring has to be applied somehow - whether paint or dye - I can't say. Colors on my covers have been stable so far. Time will tell.I love those cinnamon scales! I have four, actually.
Have you noticed the scales are painted as opposed to having the color as part of the scale material? Has yours started rubbing off?