Round Timer Freezing bug. How do I fix?

When a round is in progress and the timer is running and when a new player joins and spawns to the lobby my timer freezes. Is there a way to fix this?

My game script:

local GameTime = 120

while true do
	wait(5)
	local Hint = Instance.new("Hint", workspace)
	Hint.Text = "Game starting!"
	wait(1)
	local RandomNumber = math.random(1,2)
	local Map = game.ServerStorage["Map" .. RandomNumber]
	
	Map:Clone().Parent = workspace.MapFolder
	
	ftime = GameTime
	
	local SpawnCount = Map.SpawnCount
	
	for _, v in pairs(game.Players:GetChildren()) do
        Player = Instance.new("StringValue", workspace.Players)
        Player.Name = v.Name
        randomN = math.random(1, SpawnCount.Value)
        v.Character.HumanoidRootPart.CFrame = CFrame.new(Map:FindFirstChild("Spawn" .. randomN).Position+Vector3.new(0, 3, 0))
    end 
	
	while true do
		wait(1)
		ftime = ftime -1
		Hint.Text = "Game ending in: " .. ftime
		
		
		Playing = workspace.Players:GetChildren()
		
		if #Playing == 0 then
			for _, v in pairs(workspace.MapFolder:GetChildren()) do
				v:Destroy()
			end
			break
		end
		if ftime == 0 then
			for _, v in pairs(workspace.MapFolder:GetChildren()) do
				v:Destroy()
			end
			break
		end
		
		for _, v in pairs(game.Players:GetChildren()) do
			if v.Character.Humanoid.Health == 0  then
				workspace.Players[v.Name]:Destroy()
			end
		end
	end

for _, v in pairs(workspace.Players:GetChildren()) do
	workspace[v.Name].Humanoid.Health = 0
	game.Players[v.Name].leaderstats.Cash.Value = game.Players[v.Name].leaderstats.Cash.Value +5
end

end

Thank You and Help is Appreciated