Why my Custom Loading screen is not showing?

Local script in ReplicatedFirst:

game.ReplicatedFirst:RemoveDefaultLoadingScreen()
local PlayerGui = game.Players.LocalPlayer:WaitForChild("PlayerGui")
PlayerGui:SetTopbarTransparency(0)
local GUI = game.ReplicatedFirst.Loading
GUI.Parent = PlayerGui
wait(8)
for i = 0, 1, .06 do
    GUI.Frame.BackgroundTransparency = i
    GUI.Frame.TextLabel.TextTransparency = i
    wait()
end
GUI:Destroy()

The thing is I still see the default loading screen and when it loads up, I see my loading screen...

I am teleporting players to the private place with: Teleport:TeleportToPrivateServer(PLACE_ID, code, players,"SpawnLocation","", GUI)

GUI is in both situations ScreenGUI placed in ReplicatedFirst.

Here is a short clip of what is going on.