That means the seams of the glove (or surface of the glove) is coming apart. You're getting foam dust being squeezed out, and that shouldn't happen. You might want to entertain sending them back.
It doesn't matter if you agree or disagree
... As long as I don't bore you and I spark a moment of thought, my goal is achieved
Queng leon queng tigre ecu tacacut, queca pa? - Pampangan Mandarigma Motto