Why does this only loop in studio?(Unsolved)

It works just fine in studio. but online it only plays the same song once everytime then it stops

local MusicBrick = workspace.MusicPlayer
local Queue = game.ServerStorage.SongQueue

while wait() do
	if Queue.S1.Value == "Blank" then -- No songs in queue
		local songs = MusicBrick:GetChildren()
		while true do
		song = songs[math.random(1, #songs)]
		repeat wait() until song ~= nil
		if song:IsA("Sound") then break end
		end
		song:Play()
		song.Ended:wait()
	elseif Queue.S1.Value ~= "Blank" then -- Song in Queue
		MusicBrick[Queue.S1.Value]:Play()
		local song = MusicBrick[Queue.S1.Value]
		Queue.S1.Value = Queue.S2.Value
		Queue.S2.Value = Queue.S3.Value
		Queue.S4.Value = Queue.S5.Value
		Queue.S5.Value = "Blank"
		song.Ended:wait()
	end
end

while true do wait(.1) end