I have tried & tested the air suspension a good few times since we got the car last week & it has been flawless until tonight, I think. I was driving back on the motorway doing around 70-80mph & the suspension dropped down to the lowest setting as it should. Then when I got off the motorway I waited for it to go back up to level 2 but it didn't till I pulled up outside my house. I know it's speed sensitive & can take 30 seconds to change but my drive from the motorway to my home is about 10 minutes at around 40mph. Is this something to get worried about & the start of a problem or nothing?