AirRide Question

Im pretty new to air ride and just bagged the front of my truck. My question is my system is pretty much leakfree but im still trying to hunt down a few leaks here and there, now i just sealed up the tank a few days ago but I still lose pressure overnight. Is this common even with no leaks due to a drop in temperature???Or are there leaks popping up overnight as it gets colder, thanks for any advice or Help