Yeah,I saw your post,but...in my case it happens intermittently.
It depends on the surface it's on,for example:
I park in the garage,get a bit deeper in and it's on the well leveled pavement and no dip in the morning.If I stop a bit closer to the gate,all wheels are on uneven pavement(it's an old asphalt sunk by the weight of the car) and I get it leaning to the left 2 nights in a row.
This afternoon it sunk in just 1 hour after I came back home,so....no puncture,an air spring is fine...control unit? Gremlins? Height sensor?
IDK

__________________
e53 '00 4.4i Oxford Green II Freshly rebuilt tranny(2nd one) and transfer case/front shaft
e70 '08 3.0si Sapphire Black cinnamon leather 7 seats
e61 '06 530XI Sports Touring Silver - SOLD