Its the same with all the Police cars, ambulances and fire trucks. All of the original blue & red lights are now only white.
https://gyazo.com/28c2a18a78271ad5a05af746ae1ad07a
https://gyazo.com/c77f4727b59505ce6fb37b78766547c5
When i press escape to the pause menu/Map i can see the lights working normally but as soon as i go to play again, it changes back to the white lights.