coil conversion will fix that for good mate, plus it improves the offroad ability and performance no end,
but the only time ive had this issue was turning the car on too fast, like just spinning the key from off to engine start in 1 sec,
other then that its new to me....
I believe being a 7 seater it has to have the air suspension, plus I like the air suspension to date....though that may change if I continue to get any problems...but so far this seems a reasonable enough fix.