What is wrong with this tween script?

So I am making a sort of playlist/radio, whenever a new song comes on, I drop a ScreenGui that says "There Is A New Song" or something like that. It works fine, but after I use the Tween, it's supposed to go back up and disappear until next time, however, it stays. Here is the script below:

while true do
	for i=1,#songs do
	local sound = script:WaitForChild('OST'):FindFirstChild(songs[i])
	sound:Play()
		
	local frame = game.Players.LocalPlayer:WaitForChild('PlayerGui').SongGui.Frame
	frame:WaitForChild('SongLabel').Text = sound.Title.Value
	frame:TweenPosition(UDim2.new(0.27, 0, 0, 0), 'Out', 'Bounce', 4, false) --This works
	frame:TweenPosition(UDim2.new(0.27, 0, -0.2, 0), 'In', 'Bounce', 1, false) --This doesn't happen
	
	sound.Ended:wait()
	end
end

But unlike other scripts, the "sound.Ended:wait()" works, as if the second tween already happened. I see no error in the output. Please help!