Mine often comes on , previous generation scania , when the car in front turns left , I assume it believes by him being at right angles to me that he’s still in front , I’ve heard the stories of shot loads etc , but never had that , mine does brake but far from a emergency stop , also done it when I didn’t think I was particularly close to car / lorry in front , but it obviously thought I was too close , again brakes but not a emergency stop , also checked on driver performance & it doesn’t show as harsh brake , which ties in with what I feel & see