Mine is the 204hp e-hybrid and I had similar problems with the grip-loss, especially when trying to start a bit faster. The first reason was surely the poor tyre quality from factory - they fitted Continental Eco Contact, which is a LRR, which also means quite poor grip.
Before the cold season arrived I replaced those with Michelin Cross Climate 2. The grip is clearly better than the previous tyres, but still there will be some wheel spin if I try to push it when starting from standstill.
I think the main explanation is found in the power-torque diagram of this hybrid system. The car tries to start moving from rest with more than 300 Nm available - which will obviously lead to wheel spin, unless managed by the car electronics. And by the look of the graph bellow, plus the way our wheels spin while taking off, I would say that the torque is NOT well managed (by that I mean diminished at low speed) by the electronics of the car.
I've seen the same behavior also reported by other users of the same hybrid system on different cars, such as VW Tiguan, Skoda Octavia - in some cases with UHP tyres.