Did you preheat the garment? Nylon is really tough to apply to, it holds moisture and chemicals, needs preheated until the steam quits releasing. I don't think this is the sole issue, what brand is the jersey?
Many new jersey constructions are posing challenges this year. Manufacturing lots of fabrics form overseas sometimes have coatings that make them very difficult to apply to. I strongly recommend that anyone running a large order of jerseys constructed of nylon or polyester, run a wash test on one piece before completing the order. This time and cost could save lots of money and most importantly your name.
Sorry about your experience. Posting the brand name of the jersey and style number will help....