DescendantRemoving not working in game but working in studio??

Hi! I've tried to make a code where my snow block can auto regenerate when it's not full. However, the descendant removing function only works in studio, but not in game. I've looked for errors but nothing appears.

local CollectionService = game:GetService("CollectionService")
local TaggedParts = CollectionService:GetTagged("SnowBlock")
local respawnCooldown = 5

for i, v in pairs(TaggedParts) do
	v.DescendantRemoving:Connect(function(part)
		print(part)
		print("hii")
		if part.Name ~= "Part6" and part.Name ~= "SnowBlock" then
			part:WaitForChild("Value").Parent = v:FindFirstChild("Part".. tostring(tonumber(string.sub(part.Name,5)) + 1))
			print("Part".. tostring(tonumber(string.sub(part.Name,5)) + 1))	
		end
	end)
	
	local function autoRespawn()
		while true do
			local backup = v:Clone()
			wait(respawnCooldown)
			for i, a in pairs(v:GetChildren()) do
				if a:FindFirstChild("Value") then
					if a.Name ~= "Part1" then
						backup.Parent = v
						for i, b in pairs(backup:GetChildren()) do
							if b.Name ~= a.Name then
								b:Destroy()
							else
								b.Name = "Part".. tostring(tonumber(string.sub(a.Name,5)) - 1)
								b.Parent = v
								b.CFrame = b.CFrame * CFrame.new(0,0.4,0)
								if not b:FindFirstChild("Value") then
									a:WaitForChild("Value").Parent = b
								else
									a:WaitForChild("Value"):Destroy()
								end
							end
						end
					end
					backup:Destroy()
				end
			end
		end
	end
	print("pinato")
	spawn(autoRespawn)
	--]]
end