Question for you guys. My GPS seems to drop coverage in spots. The suburban area I live in has some two lane roads that are lined with old oak trees, and in many cases they make a canopy and cover the road. The foliage is pretty dense. Is it normal when driving in this terrain for the GPS to lose the satellite? My speed detection will drop to "0", then the screen will go blank, when I clear the trees it comes back. Detector is installed with a Blendmount. There is a small amount of plastic where the mirror joins the windshield above the detector, but for the most part it's pretty open to the windshield. The Nav in my previous car never lost contact in this area, however I would lose Sirrius/XM satellite coverage under these trees. Thanks.