R-Tronic problem after only 38TKM

Hello guys, I have a huge problem with my R-Tronic gearbox on the R8 4.2 FSI, the car has a mileage of 38TKM. I noticed last week that there is sometimes a nasty metallic noise when switching from the 2nd to the 3rd gear, about every 7th switching process. Other gears are OK and do not make any noises. The electronics shows no problem. From time to time, when I drive fast and switch near the limiter, the gear flies out and I go into N for a long time. Electronic nothing. I switch down once and am back in the right gear. I already have a bit of a bumblebee before the visit at Audi. I hope the Audi reacted there kulantly, the car didn’t really run a lot and a defect due to wrong condition should be excluded because the system works fully automatically. I drive 80% manuel and 20% manuel sport. What do you mean what is broken and what costs will come to me? Greetings RACHT