@ arpadsoo
I have had three recent firmware updates, two in the last week.
Within the first version of 5.8 firmware (about 3 1/2 weeks ago), among other things (vampire loss reduction) it also eliminated/deleted the automatic lowering of the car above 55 mph, and it could not be over-ridden to lower the suspension setting.
The second version 5.8 (?) from last week returned the automatic lowering feature, after you were above 55 mph for over 30 seconds. It also could be manually set once you reached 55 mph before the 30 second time period.
It is not possible to set the lowered height setting when the car is going below 55 mph: it beeps (rejects that setting) and returns to standard height.
The car does NOT lower quite as much as it had with the original software settings, so you should not worry about this detail when going over 55 mph.
The latest version of 5.8.4 (yesterday) addresses charging rate for the car, and will automatically reduce the charging rate by 25% if it senses there is a fluctuation in input power voltage to your vehicle.
As your car is updated, Accept the latest firmware, and the settings should return.
Hope this addresses your considerations.
To bear repeating myself: The MS is MUCH smarter than I am.