Here's a mind boggling question. On my 2013 GT500, I have a phone synced in and I have USB Drive plugged in with about 5,000 songs on it. Two times in the last week, I hit the hard Climate button under the radio to make a change and the phone was disconnected from Sync and the USB was no longer recognized. Once the car was shut off, everything reset. If I use the navigation screen button for the climate, it works fine. Any of this sound at all familiar? I am hoping this just needs an update to the system or something simple. Any thoughts? Thanks.