I owned and loved the old unit. Just upgraded and noticed something and wondering if others are seeing it too.
If riding with a few people and they open and then close a small gap it picks them up. The speed difference seems to be less than the 10kph speed differential . Even if not, once they close it takes about 30s-1min to lose them. It thinks there is a car literally on me.
Over all still super happy and suspect it is a firmware tweak. I do love the added brightness of the unit in daylight.