Hey OfficerBenzo,
Thanks for taking the time to reply 🙂 I am playing on a clean install, the only mod I have is LSPDFR, so no vehicle mods, no scripts that would work with scripthookv, etc.
When I was getting a car from the garage I was equipping it with all the vehicle improvement mods, like turbo, armor, brakes, etc. But when I was having issues I stopped doing that and started grabbing different cars and ensuring I wasn't putting mods on them and unfortunately it didn't make a difference.
The liveries could be the issue, but I am not putting them on myself; is there some kind of control test I can do when I can have a cop car with no liveries and also prevent ambient cop cars spawning?