Bike with BBS02, 52v Luna Battery, Color display. First Speedo stopped working a while back. Tore bike down in order to re-route cabling, and bought a new speedo. All is fine, except, sometimes it says ZERO mph. For instance, a 4.9 mile ride (calculated with Strava) reported as a 4.0 mile ride (calculated by Bafang color display). I've noticed that it may do this if I am pedaling and not applying throttle. Speedo is very close to magnet, so I doubt that's the specific issue. Have searched, but can't seem to find anyone with this specific issue.