Tween size and position is broken

[ArastooYsf86 (ArastooYsf)]

I was using UDim2.new to change the size and position of my loading screen bar after that I decided to use the tween service to give it some animations and
This is the result:

It was working with UDim2 before
this is the script:

local Players = game:GetService("Players")
local ReplicatedFirst = game:GetService("ReplicatedFirst")
local ContentProvider = game:GetService("ContentProvider")

ReplicatedFirst:RemoveDefaultLoadingScreen()

local Player =  Players.LocalPlayer
local PlayerGui = Player:WaitForChild("PlayerGui")

local loadingScreen = script:WaitForChild("LoadingScreen"):Clone()
loadingScreen.Parent = PlayerGui

local frame = loadingScreen:WaitForChild("Frame")
local loadingText = frame:WaitForChild("TextLabel")
local bar = frame:WaitForChild("LoadingBar"):WaitForChild("Bar")

local assets = game:GetChildren()

local TweenService =  game:GetService("TweenService")

for index, asset in pairs(assets) do
	loadingText.Text = "Loading "..asset.Name.."..."
	ContentProvider:PreloadAsync({asset})
	local progress = index / #assets
	bar:TweenSize(
		UDim2.new(progress, 0, 1, 0),
		"Out",
		"Quad",
		.25,
		false
	)
end

loadingText.Text = "LOADING COMPLETE!"
bar:TweenSize(
	UDim2.new(1, 0, 1, 0),
	"Out",
	"Quad",
	.25,
	false
)
bar.Position = UDim2.new(.5, 0, .5, 0)

task.wait(2)

loadingScreen:Destroy()

[MysteryX2076 (DrMystery)]

Set the anchor point on the loading bar to 0,0. You must have set it to 0.5,0.5

[MysteryX2076 (DrMystery)]

Also TweenSize() is deprecated, which is why your bar isn’t filling up completely. Use TweenService:Create() instead

[ArastooYsf86 (ArastooYsf)]

I didn’t read that much on dev forum to learn about tweenserver:create completely so I’m using tweensize:()
I’ll check it later by the way tnx for your help!