Have not found a solution, I tried 2 pairs. My only guess is my weight around 280 causes the middle air pocket "air" to hit weird or something. Its definitely coming from that area. If you push on the "I" you can hear the sound kind of.
This is my second pair, sent the 1st pair back, but these do the same thing. Anyone else have issues? It seems to be on the bottom center air bag where the "I" is. Trying to think of a way to stop it. I don't think it is something that would just go away.