That has nothing to do with it. It's all in the valve and how the marker is using air during the firing process. When you're shooting that deep into the tank, again, you are at or under the markers operating pressure.
So firing it rapidly is not allowing the pressure to build up when it's that low. That's why it's not recocking but it will recock, up to a point, one balling it. Again, you're just shooting too deep into your tank and your marker is starving for air that isn't there.