Why does the Countdown not count properly and timeout before resuming thread?

Got a strange problem here. I have a rounds system in my game. The first timer counts down the Intermission time, from 30 to 1, teleport the players to the map, where the Round Timer kicks in. Except, instead of subtracting every second, it takes three seconds for the timer to decrease by one. I'm confused since the Intermission timer works fine, and this did not use to happen.

This seems to be causing my game to lag on the server, I sometimes get a "timeout before resuming thread" error, but I assume that's because my script is an infinite loop? Is there a more efficient way to have my countdown timers here that doesn't trigger the timeout error?

Here's the Intermission/Round Timer script info below:

local replicatedstorage = game:GetService('ReplicatedStorage')
local status = replicatedstorage:WaitForChild('InfoValue')
local mapstorage = game.workspace:WaitForChild('mapStorage')
local StarterGui = game:GetService('StarterGui')


while true do
wait(1) 
while game.Players.NumPlayers < 2 do
	status.Value = 'There needs to be 2 or more players to play!'
	repeat wait(2) until game.Players.NumPlayers >= 2
end	

--INTERMISSION TIMER
wait(1)
for i = 30,0,-1 do 
	status.Value = 'Party Break '..i
	wait(1)
end



_G.gameplayers = {}
for i, v in pairs(game.Players:GetPlayers()) do
	
	if v then
		table.insert(_G.gameplayers, v.Name)
	end	
end


-- Random Map selection & Spawns
local mapsinserverstorage = game:GetService('ServerStorage').Maps:GetChildren()
local chosenmap = mapsinserverstorage[math.random(1,#mapsinserverstorage)]
chosenmap:Clone().Parent = mapstorage
status.Value = 'Get ready to be teleported!'
wait(3)

local spawns = chosenmap:WaitForChild('Spawns'):GetChildren()
for _, player in pairs(game.Players:GetPlayers()) do
	if player and #spawns > 0 then
		local torso = player.Character:WaitForChild('Torso')
		local allspawns = math.random(1, #spawns)
		local randomspawn = spawns[allspawns]
		if randomspawn and torso then 
			table.remove(spawns, allspawns)
			torso.CFrame = CFrame.new(randomspawn.Position + Vector3.new(0,2,0))

						
		end
	end
end



-- ROUNDS TIMER


for i = 240, 0, -1 do 
if i == 0 then
	
	status.Value = 'Time up!'
	break
end	
	wait(2)
	
	if #_G.gameplayers == 1 then
		for i, v in pairs (_G.gameplayers) do
			if v ~= nil then
				status.Value = v..' is the winner!'
				game.Players[v].leaderstats.Wins.Value = game.Players[v].leaderstats.Wins.Value + 1
				break
			end
			
		end
			break
	else
		status.Value = i..' seconds remaining!'
	end
end

mapstorage:ClearAllChildren()
wait(3)
end