All good. I also have a 1.4 sensodrive - experiencing the same problem when I approach road crossings, speed bumps, roundabouts etc. When the senso is in Auto mode, it refuses to change down to first gear - unless I stop completely or use the paddles or the stick. This is acceptable once you understand that you have to "help" the system by using paddles or stick. However - when I do this downchanging manually the clutch sometimes refuses to engage fully when first gear is selected - the revs go up and the car moves real slow - which leaves me like a target in the middle of a roundabout, road cross or wherever I am - for every other car to crash into me. When the clutch finally engages - the whole car jumps/jerks forward like an old GS with a clutch soaked in oil. I have been really close to getting smashed into several times lately because of this - and I'm really thinking of trying to get my money back. I've had all the updates of the software, and Citroën still claims it is a software problem. I suspect it might be the clutch actuator - but my mechanic still tells me it is software. Since the problem is random (not consequent) I doubt that it can be a software problem.
A real shame - since every other aspect of this little car is so great!