Like many fenstron equipped helicopters, the Cabri requires anticipation of the pedal requirement - in forward flight the fin is producing a lot of the anti-torque.
As you lose ETL, the fan has to work harder to replace that loss of fin-lift and so requires a great deal more power pedal.
Add in a crosswind where the aircraft wants to weathercock and it is quite easy to end up with undemanded yaw - not LTE - and often FULL right pedal is required to maintain or correct the heading.
So not much to do with the engine - until the very high rate of yaw has an effect - but mostly to do with lack of skill and possibly training.
Not saying this was the cause of the fatal accident in this thread - more a comment on the other accident linked above.