Non ELS siren corona "multiples" glitch

I am having an issue where a vehicle siren seems to ignore the "multiples" setting in carcols, but only sometimes. With a rear facing siren corona (delta 3.14159300) and facecamera set to false, the siren acts like the multiples value is set to 2, even though it's set to 1. However, if I set the delta to 0 and set facecamera to true so that it is still visible from the rear, it will act as it is supposed to with a multiples value of 1. I've been racking my brain and trying to experiment with other values to see if this is linked to something else and can't figure it out. I even copied the siren setting from a rear facing corona on the police buffalo and used it in my siren setting but the issue prevailed