I just kegged an APA and the weirdest thing happened. Or maybe it's not that weird I just have not experienced it until now. When I attach the gas line to my keg (ball lock) CO2 starts shooting out like crazy. But if I turn the gas off and keep the QD attached to the keg it stops leaking. I tried changing the QD but the same thing happened. It seems to only leak while the QD is attached and the gas is on. Any suggestions?