Suspension dropping X5 4.8is only in cruise mode.

[pw44]

Thx for the answers.
When in offroad mode, it mantains this mode with no lowering, parked for more than one day. When driving bellow 55 Km/h, it also maintains the offroad mode.
The problem is when it return to normal mode, driving, than it begins to lower until the front looses all pressure., so there are no leaks in the bags.
The air hissle i hear comes from under the car, right side, when in normal mode, driving. Leaving parked in normal mode, it maintains the height.
Any ideas?
Thx in advance.