Its never happened to me but Id give the reset a try, its not a big deal and easy to do (ive had to do it lots of times LOL) but you do lose some of your saved info like wallpaper you downloaded, your nav presets, Sirius radio alerts (which is the only one that annoys me). Cant remember what else but its minor I think.My 2016 MKC has a thin black line running thru the SYNC 3 screen. Has anyone had this? I know there was a way to reset the system. Any chance that would help clear it up? Naturally my eye goes right to the line!