I’ve shot this gun 3 times, each time putting a few mags through so I would say I’ve put about 3-400 rounds through it. After the second time I shot it, I first heard what sounded like a slow leak. Very faint bubbling. This developed into a full blown seal leak. I disassembled the valve, oiled the seals and put it back together and didn’t hear any bubbling. Shot it today and the bubbling started and even got faster but then stopped completely. Is there another leak starting or is the bubbling normal?