Grenade works properly in a local test, but not with filtering enabled?

I'm new to scripting and I'm trying to make a grenade compatible with filtering enabled. In a local test it works like it should, but in a team test the grenade throws but in one specific direction. What I mean by this is that if I aim at a specific point, the grenade could, say, throw behind me as if it was heading toward one specific spot. It's probably something simple I'm missing, but it ALWAYS goes towards the same exact direction no matter which way my character faces. Any help would be greatly appreciated.

Tool = script.Parent

function fire(v)
    Tool.Handle.Fire:play()
    local vCharacter = Tool.Parent
    local vPlayer = game.Players:playerFromCharacter(vCharacter)
    local missile = Instance.new("Part")
    local spawnPos = vCharacter.PrimaryPart.Position
    Tool.GripPos = Vector3.new(0, 0.4, 0.5)
    vCharacter.Torso["Right Shoulder"].CurrentAngle = 3
    spawnPos  = spawnPos + (v * 8)
    missile.Position = spawnPos
    missile.Size = Vector3.new(1,1,1)
    missile.Velocity = v * 60
    missile.Name = "Grenade"
    missile.BrickColor = BrickColor.new("Medium green")
    local force = Instance.new("BodyForce")
    force.force = Vector3.new(0,100,0)
    force.Parent = missile
    Tool.Sound:clone().Parent = missile
    Tool.Kill:clone().Parent = missile
    Tool.Smoke:clone().Parent = missile
    Tool.Handle.Mesh:clone().Parent = missile
    Tool.Script:clone().Parent = missile

    local counter = Instance.new("ObjectValue")
    counter.Value = game.Players:GetPlayerFromCharacter(Tool.Parent)
    counter.Parent = missile
    counter.Name = "creator"

    missile.Parent = game.Workspace
end

Tool.Enabled = true
function onActivated()
    if not Tool.Enabled then
        return
    end
    Tool.Enabled = false
    local character = Tool.Parent;
    local humanoid = character.Humanoid
    if humanoid == nil then
        print("Humanoid not found")
        return 
    end
    local targetPos = humanoid.TargetPoint
    local lookAt = (targetPos - character.Head.Position).unit
    fire(lookAt)
    wait(0.1)
    Tool.Parent = nil
end


script.Parent.Activated:connect(onActivated)