Why is this script locking player movement?

function Shield()
    local cooldown = 17.5
    local up = player.Character.S1up.Value
    local parts = player.Character:GetChildren()
    for i, v in pairs(parts) do
        if v:IsA('BasePart') then
            local shield = Instance.new('Part', v)
            shield.CanCollide = false
            shield.Material = Enum.Material.Neon
            shield.Size = v.Size
            shield.Anchored = true
            shield.Position = v.Position
            shield.Color = Color3.new(0, 0, 0)
            shield.Transparency = 0.6
        end
    end
end

As you can see, i'm trying to make a shield effect on a player's character (I know its anchored, i've just started it). It works as expected, but if you're facing almost perfectly forward or backward, using it locks you in place. I suspect it could be because it's making a joint on the player, but i'm not sure how I would prevent that, and that might not be whats happening. Could anyone help me fix this?