This is just one quote I found with a quick search.
In today's air suspension system, valves play a critical roll in isolating and controlling where air is directed and how. Early generation air suspension systems were two-way setups. Essentially, each left and right air bag was connected by a line and shared air. As the vehicle cornered, one air bag compressed its air and pushed it through the line to the other air bag, which was expanding. This resulted in severe body roll and accounted for part of the reputation air suspension systems had for causing a terrible ride. Now, systems use a series of valves that control this tendency and offer bettering handling.
You may not notice it in normal moderate driving conditions, particularly as you are obviously used to it. But you are effectively only getting half the resistance you should from the bag under compression and at the same time inflating the opposing bag which should be unloading, both of which will increase body roll.