I was at the service center today because my left FWD would show close obstructions (red arc) with nothing nearby. After picking it up, I noticed it showed the right FWD with a close obstruction (red arc), even though the model S was parked about 42" away. The service advisor said that this is normal. Discounting the fact that I've probably opened this FWD a thousand times with it never showing red from that distance, do you guys think this is an issue that is covered under warranty? I couldn't find any definitive information about when a FWD will think there's a close obstruction in the owner's manual.