Combat script working weird

[steady orchid]

So my combat scripts work but not all the time. sometimes I cant deal damage. I noticed that when I'm hitting someone in the back that's when it usually don't work. Here's the script:

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local combatEvent = ReplicatedStorage:FindFirstChild("RemoteEvent"):FindFirstChild("CombatEvent")

local SS = game:GetService("SoundService")

local damage = 10

game.Players.PlayerAdded:Connect(function(player)
player.CharacterAdded:Connect(function(character)
local combatStatus = Instance.new("StringValue", character)
combatStatus.Name = "CombatStatus"
combatStatus.Value = ""
local hitbox = Instance.new("Part", character.HumanoidRootPart)
local weldConstraint = Instance.new("WeldConstraint", hitbox)

    hitbox.Name = "Hitbox"
    hitbox.Anchored = false
    hitbox.Massless = true
    hitbox.CanCollide = false
    hitbox.Transparency = 1
    hitbox.Size = Vector3.new(30,38,30)
    hitbox.Color =     Color3.new(1,0,0)
    hitbox:PivotTo(character.HumanoidRootPart.CFrame)
    weldConstraint.Part0 = hitbox
    weldConstraint.Part1 = character.HumanoidRootPart
end)

end)

combatEvent.OnServerEvent:Connect(function(player, eventType, arg1)
local character = player.Character

if eventType == "M1" and character.CombatStatus.Value == "" then
    character.CombatStatus.Value = "Attacking"
    local At = character.Humanoid:LoadAnimation(script[arg1])
    At:Play()
    SS.Swoosh:Play()

    local startPosition = character.HumanoidRootPart.Hitbox.Position
    local direction = character.HumanoidRootPart.Hitbox.CFrame.LookVector
    local RayCastParams = RaycastParams.new()


    RayCastParams.FilterType = Enum.RaycastFilterType.Exclude
    RayCastParams.FilterDescendantsInstances = character:GetDescendants()

    local ray = workspace:Raycast(startPosition, direction * 100, RayCastParams)

    if ray and ray.Instance and ray.Instance.Parent:FindFirstChild("Humanoid") then

        local enemyCharacter = ray.Instance.Parent
        

        local random = math.random(1,2)


        SS.Hit:Play()
        enemyCharacter.Humanoid.Health -= damage



    end
    At.Ended:Connect(function()
        character.CombatStatus.Value = ""
    end)
end

end)

[tacit lily]

if ur hitbox is werid try using a os hitbox module

usually don’t use a ray for m1 strings

[fathom wagon]

Like G1C said don't use rays for m1 hitboxes and i would also recommend not playing animations on the server. Here is a tutorial that goes over multiple ways you can create hitboxes in roblox https://youtu.be/-oVHaPCOIf4?si=-3-kKNlP9kaLcUBE

[steady orchid]

Thanks