LCS Air Arms SK-19 30 cal air dump

I was out shooting my SK-19 and all of a sudden all the air began blowing out the barrel and magazine area. All the signs of a blown poppet valve in a regular PCP, this is my 1st hammerless so new experience. I was about the reg pressure so that's not the issue. Any suggestions?
Slow? Brocken firing valve. (Like poppet)
Instant dump then stop? Letting pressure get too low and/or magazine jam.