My script seems to skip over this sometimes (lag related?)

Sometimes, this block of code doesn't execute usually when there are more players in the game. What can I do to make sure it will work without skipping any player? Could the false parameter on TweenPosition cause it to skip?

    for i,v in pairs(game.Players:GetChildren()) do
        if (v.Character ~= nil) then
            if v.Character:FindFirstChild("Health")~=nil then
                                wait()
                v.Character.Health:Destroy()
                game.Players[v.Name].PlayerGui.GameGui.Intermission:TweenPosition(UDim2.new(0.5, -50, 1, 0), "Out", "Linear", .3, false)
                --game.Players[v.Name].PlayerGui.GameGui.Intermission.Visible = false
                game.Players[v.Name].PlayerGui.LocalPlayerScripts.Intermission:Stop()
            end
        end
    end