Just purchased my 1st N scale Charger but noticed the front headlight stays on full time and can't seem to be turned off by F0 and doesn't go out when the loco is in reverse (the front headlight and front red markers will both be on). It also appears it can't be dimmed. Videos online seem to indicate this is not normal. Also, the headlight will also stay lit for a couple minutes after the loco is removed from the track. Do I have a faulty loco?