I use my Android device for music a lot when I'm driving via USB. Never had a problem with it. I always leave my cable plugged in to the USB and just connect my phone as desired. Normally, when I connect the phone, it will auto switch the source to the USB from whatever I'm using (usually SXM.) When I disconnect my phone, it typically switches directly to FM. Within the last few days, when I connect, it only sometimes will switch to USB, but I only get as far as "Reading USB." Now, even with the phone disconnected AND the cable completely removed from the USB port, the USB button remains an active option on my "Source" screen and even with nothing connected says "Reading USB." Normally, the USB and Aux should be "grayed out" when nothing is connected to them. Any thoughts? Do I need to replace the port?