I've had the same issue recently.
It used to go couple of times a week for like 6 months then it started to be there every single time around 40-50kmph.
I brought it to the dealer. They told me it was when shifting from gear 2 to gear 3 (on automatic gearbox).
Got it fixed under warranty (I had to supply the recording you already have).
They had to replace the clutch. My part number was 0AM198142AC. Cost of parts was around 1000 EUR (original).
Hope this helps.