I have a 2.0 140 DGS Octavia 14 months old and it has done this only twice. Change up from 4th to 5th then 6th the car judders very badly for a few seconds. I have had it to MSB and they can not find any faults with it nothing in the logs and can not recreate the problem!!!!

Find someone from here local to you with VCDS and ask them to have a look for any codes

Dealer has checked for codes but no error codes there, I went out the the mechanic and it did it when he was in so it's now booked in for the 4th Jan so the can check the DSG and hopefully fix it. They think its the mechatronic unit.

great news, well, you know what I mean

Let us know how you get on