It's more like a very quick "one second" jolt forward due to additional power from engine. Perhaps another way to describe issue. Slightly braking, regen is on, CMAX car feels like it is being held back as usual while going down hill. Then a very quick one second jump forward occurs followed by regen working, car being held back as usual. Happens infrequently, 3 out of 10 times.
Plan to test
- car in L gear
- car in neutral
- car with traction control on (luckily few bumps or potholes on roads)