Like I said...Originally posted by dr.strangelove
This really doesn't seem that unreasonable, the 'ccoker is just operating as a blowback, meaning that something, be it spring pressure from the valve stem, or gas being released from the valve, is causing the hammer to reset. Doesn't seem like anything too serious, you just might want to check that your pressure settings are correct, maybe change your valve spring, check your valve O-rings, and make sure it's seated okay.