This is a problem with any key-less ignition on my Honda Odyssey. I accidentally lightly touched the ignition button when doing a right turn signal, the engine cut off right away and my car is rolling without power. I called Honda and they said it is normal. It is very dangerous to have your engine cut off on a highway, but luckily I'm on my exit and I'm going about 45mph and was able to come to a stop at a safe place. Toyota design their ignition cut off by press and hold for over 3 seconds, and I think Honda should do the same.