I've twice had my N300 Megane flip over on that same kerb, although in my case the car was never bouncing before it happened - it's just flipped in a straight line. There's a kerb in the sweeping bends up the hill that launches the car if you clip to too - that's cost me some good finishes in races. I assume both are glitches?
I flipped my megane on dragons trail on the 1st chicane, on the exit over the curb funny bounce then flipped over and over. Seemed more like a bugged curb than an actual flip though.