Large pedal movements will cause torque fluctuations, especially with a quartering tailwind. It's nothing unusual. You have to be really careful when landing or taking off with a wind on your right, because the 206 will weathervane enthusiastically, and the large, rapid left pedal inputs that result can easily result in an overtorque. If the wind is on the left, right pedal will be required, and not cause the torque spikes.