It looks like the green is peeling off the foil for some reason. It might be sticking to your cover sheet or there might not be enough adhesive under it to get it to stick all the way. Or you might not be using enough pressure or letting it cool completely before removing.
What kind of ink are you pressing it on? It will work with plastisol and foil adhesive.
What kind of ink are you pressing it on? It will work with plastisol and foil adhesive.