yeah, i had the same problem, unfortunately nothing can help you. not only that your skin will dissappear, but your camera won't take pictures too because when the skin dissappears phone losses the capability of reading all pictures format so you wont be even able to view pictures which were taken even earlier. this all fixes when you restart the phone but it will happen every half an hour or so. in my opinion, walkman skin is not worth losing your nerves so just remove the skin and you won't have any problems