My experience has been that the lycra doesn't force migration of gas in the suit. It does tend to slow down transfer of bulk amounts of gas, and, when in a single body position for a while, tends to "pool" it.
I have not punctured the suit, but can address gas behavior out the exhaust valve. As long as the valve is lower than the bubble of gas in the suit, the gas stays put. You have to roll the valve higher than the bubble to get gas to come out. In this it behaves like any other suit, just with a bubble that is easier to manage amount, and location, than the norm.
So I'd imagine that a puncture behaves the same.
All the best, James
I have not punctured the suit, but can address gas behavior out the exhaust valve. As long as the valve is lower than the bubble of gas in the suit, the gas stays put. You have to roll the valve higher than the bubble to get gas to come out. In this it behaves like any other suit, just with a bubble that is easier to manage amount, and location, than the norm.
So I'd imagine that a puncture behaves the same.
All the best, James