I just bought a new 2018 Cannondale Synapse. I got the last 2018 at a local shop at a great discount (Dura Ace at 50% off). Its my first carbon frame and I just noticed a strange imperfection at the top of the seat tube, right where it meets the seat stays. It kind of a small square indentation, with one of the sides very uneven. Very hard to say if that uneven surface is a crack. Can this be some kind of normal imperfection of the carbon or paint? Naturally I would love to keep the bike given the great deal, but I am nervous that this can be a crack or lead to a crack? Apologies for the quality of the photos, it´s quite difficult to capture, its very small, maybe half an inch.