Jumped on the highway today to go out of town for the weekend. I put the car in EV later mode. When the IcE is running, the sound system (stock Sony) is normal. But when coasting down a hill or slowing for traffic when the car goes to EV, the bass turns off. Why is this? It's definitely noticeable. It sounds like it turns off the subwoofers in the rear deck. I just hooked up my amplifier and subwoofers and taped the deck subs, same problem, it cuts the signal in EV