Been reading this thread for a while but only just registered to reply.
Picked up my Superb SE L Hybrid in August and after around 1000 miles, received the Assist systems failures. Dealer carried out a reset and the alerts cleared but returned after a couple of weeks. Dealer tried to clear them again but with no luck, this was probably end of October.
Spent a fair amount of time in discussion with them as I've been a customer of theirs for a while (usually change my car every couple of years, previous was an SE L Kodiaq), beginning to wish I hadn't swapped it for the Superb! They eventually informed me that it's a known fault and Skoda are working on a fix.
Anyway, long story short, Dealer called me at the start of December to let me know that the fix is available. I'm taking the Superb in later today and they will work on it tomorrow.
Will let you know, how it goes... wish me luck!!