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