Why does my GUI Button Tween to a broken position instead of the wanted one?

So I want to make a simple animation but this button just doesn't cooperate.

The start screen: https://gyazo.com/34be4d4f575862700b001f0ddccf4b27

The start position of a button is: {0.5, -138},{0.6, -34}

Then the position the button should be after tweening: https://gyazo.com/568e9211b8bcb6b4f427f151b7992645

The position of it would be: {0.5, -138},{0.8, -34}

But it goes here: https://gyazo.com/6cef9c3128e3d4ba74edb55aa0f4f0a8

But the position is still: {0.5, -138},{0.8, -34}

The tween script of it is:

local Play = script.Parent.Main.Play
local PlayStop =0.5, -138,0.8, -34
	
	Play.Visible = true
	Play:TweenPosition(UDim2.new(PlayStop), 'Out', 1)

Why does this happen?

I'm not exactly sure, but try this:

local Play = script.Parent.Main.Play
local PlayStop =0.5, -138,0.8, -34
	 
Play.Visible = true
Play:TweenPosition(UDim2.new(PlayStop), 'In', 1)