Quoted from mtp78:
It was not there when game came out of the box, JJP thinks the siderail when installed at the factory was not pushed down before the carriage bolt was tightened . So with the weight of me pushing on the lockbar when playing pushing down the siderail and the decal....I am going to loosen that carriage bolt and try a heat gun and slide it back in place. Really pisses me of but not the end of the world. Butch at JJP tells me wonka is using thicker decals and more durable than pasts games .
So are you getting a new decal? If not, I bet you could remove armor, and carefully pull it back and flatten with new adhesive. It would drive me nuts too. Good luck.