First post here so Hi!
I have the same issue with my 2016 Avant. After researching the 'web' I'd come to the same conclusion as the OP and above - universal joint. I did have my car booked into my local VAG mechanics to check the issue, but I've had to cancel due to work.
I am going to get this checked by the mechanic ASAP, but I have to take the car on holiday tomorrow for a weeks tootle around Wales and I guess I'm just hoping that the wheels don't fall off during the trip. I know that nobody can confirm this, but are there any other more serious scenarios which could cause the same symptoms?
Thanks in advance.