I have a 2 lane permanent digital layout, recently ressurected after years of no use. I've had the track running fine- both lanes, analogue and digital and up to 5 cars running as pace cars ( I have the advanced six car powerbase) Track recently developed an issue with one lane being noticeably slower than the other. I've swapped controllers, swapped cars, swapped power packs and deduced the issue is with that particular lane. I've also noticed that there is a small amount of power going through the slow lane.. even with no controller connected ( this is in analogue mode). Does anyone have any thoughts as to what the issue could be? Thanks