F12 - issue to fill gasoline in tank

After around 2 years with my F12 it suddenly becomes difficult to fill up the gasoline at the gas station. Whatever gas station or nozzle I try, I can only very slowly fill up the tank, if I try to fill up with usual flow, the "counter pressure" stops the filling at the gas pistol. Did anyone experienced the same or has any hint how this can be fixed? Thanks a lot !

 

Thanks Red Sled, will ask the shop to look at the tank breather valve.