Interesting, two questions:
a.) I take it there is zero wheelspin during these 'interceptions'?
b.) Is the rolling circumference the same as the summer tyres? Importantly both the front AND the back. List the sizes you took off and what you put back on.
I can only think that the tyres are expanding at speed (centrifugal forces, like a dragsters rear tyres) but at different rates, causing a speed difference, which fools the car into thinking there is loss of traction.
Runflats are extremely stiff, so don't suffer this issue as much,as perhaps softer structured non run flats, and soft tread winters at that.