Sliding clutch (DSG7/DQ200)

So, my car is going in for having various bits fixed under warranty this friday. Faulty speaker in drivers door, rear wiper only wipes 10-ish centimeters of the window, engine has a fault code and the famous washerjets with low pressure in the front. On top of that my clutches has began to slide, specially in third gear (see video). Has any of you experienced a similar problem (it´s easy to spot, if you accellerate in third/manual mode gear from low revs). Car is a S3 1.4 TSI ACT DSG which has only covered 4800 km.

Dealer said, they will have a look at it. By searching the internet, I don´t feel that confident, that they can cure it. I have sent of an email to SkodaDK asking for advices.

https://www.youtube.com/watch?v=_TW7FIgkOVo&feature=player_embedded