Air Ride Issue

I have the DIY air ride with the monroe shocks. Everything has been working fine for the last couple months. On the way to work today I hit a light bump in the road and the rear end dropped all the way down. My air pressure gauge still read 80psi. Pulled to the side of the road and hit the dump switch. There was still plenty of air in the lines. Went to air back up and it took ~3x as long for the bike to start to raise up. It did not start raising until the gauge read close to 140psi. Does anyone have any suggestions on what could have caused this or what could be lose? It seems to me if there was a loose hose the system would be leaking air and the gauge would not be holding pressure?