Engine Jerk During Acceleration: Causes & Fixes

I'm having a small problem with my car (A4, AHU model, manufactured in 1996).
I've already searched the forum, but I couldn't find anything that really applies to my situation.

"When I completely release the accelerator pedal at speeds below 80-100 km/h, I feel a strong jolt throughout the car, as if the engine momentarily cuts out. Generally, I can say that the more speed I have, the less pronounced it is."

The car was recently at a Bosch service center to have the ESP resealed. Perhaps they misconfigured something? It definitely wasn't an issue before they resealed it.