My 11 Nitro does this, as did my 06 Commander. You have to understand how the receiver works. You are not listening to a "live" signal, but a signal with a slight delay. That is why you continue to hear sound when you are under the obstruction, depending on how big it is, and then the signal is gone for a second or two after you pass the obstruction. This dead time is the time it takes to reload the signal. This may be a trait with only the receivers built for Mopar. The receiver for my Jeep was a separate unit, mounted under the rear passenger seat. The receiver for the Nitro is built into the radio. I believe Chrysler changed this model year 08, at least with the Commander. The receivers may be made by the same company, but I'm not sure on this point either. Hope this helps.
__________________
2011 Nitro Heat 4x4:
Bright Silver Metallic,
Dark Slate Gray; Customer Preferred Package 24C; Trailer Tow Group; Hood-to-Fender Stripes; Navus 2; Uconnect.
MODS: S/S Nerf Bars;
Mopar Chrome Rear License Plate Brow, Chrome Exterior Package, Production Style Cross Bars, Deluxe Molded Splash Guards, Cargo Security Cover, Door Sills & 3.7L Emblem; Media Center 230; Kicker Speakers; Carbon Fiber Dash Kit.
FUTURE MODS:
Mopar CAI, Pedal Kit; Heated Katzkin Leather.