:MoveTo() not working in Online mode?

repeat wait() until game.Players:FindFirstChild("CurrentPlayer")
if game.Players:FindFirstChild("CurrentPlayer") then
    plr = game.Players:FindFirstChild("CurrentPlayer")
    chr = game.Workspace:FindFirstChild(plr.Value)
    monster = game.Workspace.Monster
    monster.Parent = nil
    print(chr)
    function appear()
        monster.Parent = game.Workspace
        monster:MoveTo(chr.Torso.Position + chr.Torso.CFrame.lookVector*15)
        monster.Monster1.WalkSpeed = 7
        monster.Monster1:MoveTo(chr.Torso.Position, chr.Torso)
        wait(1)
        monster.Monster1.WalkSpeed = 0
        wait(2)
        monster.Parent = nil
    end

    while wait(math.random(5,10)) do
        appear()
    end
else
    print("Fail")
end

So I created this script recently and it works perfectly in Solo mode, but whenever I try it in online mode, the monster spawns properly but does not walk to me as I want it to do. Any suggestions? No errors.