Car "jumps" when pushing the stop-button

Hi all

I own a 2013 "new" GC4P, 1,6Hdi with automatic gearbox (the manual/automatic one:-) ). It've reached 145'000km on the clock. It runs smoothly, but sometimes when stopping the engine it seems to make a "jump" after stopping. Almost like it makes an extra turn before stopping. This makes the car slightly "jump" before the engine cuts off. It feels like the engine is shaking a bit. Anyone with any idea on what could cause this?

Thanks in advance

Br
Marius