Roblox Rivals Silent Aim

I made Rivals Silent Aim and it seems to be detected.

If you put 150 damage, you have to die, but sometimes you don't die even if you put 200 damage

Does anyone know about this?

The script source is as follows

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Players = game:GetService("Players")
local CollectionService = game:GetService("CollectionService")
local Camera = workspace.CurrentCamera
local LocalPlayer = Players.LocalPlayer


local Settings = {
    Enabled = true,
    FOV = 150,
    TargetPart = "Head",
}


local function GetClosestTarget()
    local closest, closestDist = nil, Settings.FOV
    local screenCenter = Camera.ViewportSize / 2


    for _, entity in ipairs(CollectionService:GetTagged("Entity")) do
        if entity == LocalPlayer.Character then continue end
        
        local hum = entity:FindFirstChildOfClass("Humanoid")
        local root = entity:FindFirstChild("HumanoidRootPart")
        local targetPart = entity:FindFirstChild(Settings.TargetPart)
        
        if not hum or hum.Health <= 0 or not targetPart then continue end


        local pos, onScreen = Camera:WorldToViewportPoint(targetPart.Position)
        if onScreen then
            local dist = (Vector2.new(pos.X, pos.Y) - screenCenter).Magnitude
            if dist < closestDist then
                closest = entity
                closestDist = dist
            end
        end
    end
    return closest
end


local Utility = require(ReplicatedStorage:WaitForChild("Modules"):WaitForChild("Utility"))
local oldRaycast;


oldRaycast = hookfunction(Utility.Raycast, function(self, origin, target, distance, filter, ...)
    if not checkcaller() and Settings.Enabled and (distance == 999 or distance == 400) then
        local targetEntity = GetClosestTarget()
        if targetEntity then
            local targetPart = targetEntity:FindFirstChild(Settings.TargetPart)
            if targetPart then
                return oldRaycast(self, origin, targetPart.Position, distance, filter, ...)
            end
        end
    end
    
    return oldRaycast(self, origin, target, distance, filter, ...)
end)