Mine is like that but even more extreme. It has that strange wavy pattern throughout the entire jacket. Looks terrible. I haven't had a chance to try ironing it out, because otherwise it's basically unwearably ugly.
Definitely contact them. This isn't a subjective good will warranty repair to a worn garment. It's a product arriving damaged beyond repair, which warrants a refund. If they won't refund you, you can definitely file a claim with PayPal.
Watch out for an additional 15% trade war tariff on made-in-China products, including the J1A-GT. I learned that the hard way with a recent order. I think all other Acronym products are made in Europe though, so it shouldn't be a concern.