this happened to me with my dark silver reissue. I could see it for several days. it was a small disaster for me but over time it improved while i massaged it and now it has vanished. after that i kept my bag in room temerature not in a closet or in a box. I also remember that when this happened i left it some minutes in the warm sun of my country(that resembles to the hair dryer method i guess a little bit).