[Help] Mysterious problem with siren lights

help

#1

Hello everyone, I have a problem that I can not solve, I have a police vehicle where the lights of the sireme does not work immediately, only after performing a restart on the mod of this vehicle.
I have already disabled almost all similar mods, other vehicles and I continue with this problem.
Tested without ELS and ELS
Could someone give me tips to solve this?

Thank you!