997/2 with PDK goes off when starting up!!!!

Hello everyone, have an inconvenient problem with our 911er. The car is equipped with the new PDK transmission and has the following problem: The engine dies when it comes to sorting, driving backwards or starting, as if you let the clutch come too fast, it came already in dangerous situations and the problem is allegedly not known according to Porsche! It occurs especially with the gentle start and connecting gas ‘lubbing’, the engine then simply goes off, or with the backward out drive the driveway, which is a bit exhausting and confusing for me, so that you have to be careful at the exit ‘strange’, with light gas foot and unfortunately also jerky gas shocks. If you then go after a somewhat rough gas shock from the gas, because you still see too little to drive directly out of the driveway, the engine simply dies off!!! According to Porsche, the switching points were recalibrated during the last workshop visit, but now it happened again several times! Has jeman d here perhaps the same problem or does the cause of this problem know?? Greeting