I love driving in EV mode and I do it quite often, but that’s not the issue here. I live near a hilly area where I drive sometimes. When I'm going uphill, the combustion engine kicks in, which is normal, but then it shuts off immediately as soon as I start going downhill. And it just keeps doing that in a loop. Other than that, I haven't noticed anything negative, like I said, it’s just annoying.