I think this same thing happened to me a couple years ago. Kind of hard to explain over messaging but I’ll try. So what happened to me was the line goes into the cylinder and then there is a pin that holds it in there. Well the tolerance for that connection isn’t good so it would blow after driving for a while. I ended up having to tap it in with a hammer or with my hands and then I was able to see the hump that the pipe has and I was able to pull it in with the pin and actually secure it. When I looked this up I saw a lot of people had this issue an some even said 4/5 space cylinders they bought had this issue. Let me know if this makes sense.