ETS 2 v1.27.2.3s PROMODS v 126.7
Both unloading spaces at EURO GOODIES in KOSZALIN Poland are obstructed by pallets, Unable to complete job.

Suspect you tried to exit the quarry in automatic drive, this causes the engine to surge.
I dedicated a keyboard symbol so I can change to sequential gearbox, you will find its much easier to keep the revs up and keep traction.