Mazda 6: Slipping at Acceleration

Hello, My Mazda 2.0 (143 hp), Diesel, EZ 03/06, has from time to time when accelerating short engine-slips (light rolling). In the previous 7 months this occurred perhaps 3 times, also at the beginning at approx. 2,000 km mileage. Today however only 3 x. All this according to my memory always after a longer motorway ride (today 150 km), in the 5th gear, slightly undertouring (90 km/h) during acceleration. Directly afterwards everything ran calmly, even during normal to consciously violent acceleration in the following Traffic jam (1st-4th gear). I asked myself after the previous report, if this is on the DPF, because it was absolutely sporadic (so far). However, I have not had a problem with the DPF at 15,000 km (no lamp, oil level only low above Full, so far no oil change). Does anyone have similar experiences? Or a possible explanation? Thank you and greeting