Im not going to say its a 100% the same as a recent issue but I would bet it is. I recently had this same issue with my pipe in a new jet, the problem is the pipe is most likely welded at both ends of the outer/inner walls. This is from the the inner wall expanding from heat and since the outer wall is not free floating at one end it stretches the outer pipe and when it cools it does this.
Who makes the pipe?