I'm the not-so-proud owner of a 2024 facelifted A3 S Line that I picked-up on July 12th, and like you all have experienced the same faults from Day 1.
It's not just the loss of being able to store your favourites, but the total inability to store any personalised settings that I find galling.
I've been trying to get my local dealership to acknowledge that the fault is not limited to my car, but is across the entire production run of A3s etc., but was told that I shouldn't believe everything you read on the Internet !!
It's booked in for diagnostic review on the 6th, which is perilously close to the end of my 30 days, but given what I've read I'm not holding my breath that I'll see a permanent solution to the problem.
Hopefully when push comes to shove, if no fix is found then my dealership will be as reasonable as Clifford's.