Hoping to get some feedback and advice on whether to return or be concerned about what I see between the high frets on this Epiphone I just picked up as a store demo in "Mint" condition from a reputable reverb.com seller. I’d noticed some strange pattern mark beneath the high strings, and then also saw that the fret almost appears to be pulling up some ebony? I can feel a slope in the spot and it appears to almost be cracking, for lack of a better term. What do you all think? I'm ok with some minor cosmetic blemish, but do you think this is a structural concern?