Can anyone explain why this Module Script works in a real server, but not Studio?

So I wrote this Module Script, it's purpose is not relevant, but as you can see I declare serverdata at the top of the Module. Then I go to add an element to it at the end of the module.addBuilding function. I check the table, everything looks fine. Then, I go to call the module.saveServer function and it views the serverdata table as having no values in it.

When in studio, what I said previously happens. While in a real game server, it all works fine. And no there isn't anything that is modifying the data in between when I add it to the table and retrieve it.

I have come across this problem twice now, and I still have no idea why it works in a real game server, but not in studio. It seems like the opposite of what usually ends up happening (works in studio, not in real game server).

local DataStoreService = game:GetService("DataStoreService")

local D_Version = 0
local ServerDataStore = DataStoreService:GetDataStore("TestGameData"..D_Version)

local Server = "Server::Test0"
local seperator = "|"

local serverdata = {}

local module = {}
    -- Building Helper: Type|Name|CFrame|Owner|Health
    module.addBuilding = function(building)
        local stringElement = "B"..
                            building.Name..seperator..
                            tostring(building.PrimaryPart.CFrame)..seperator..
                            tostring(building.Configuration.Owner.Value)..seperator..
                            tostring(building.BuildingHealth.Health)
        table.insert(serverdata,stringElement)
        print(#serverdata)
    end

    module.saveServer = function()
        local data = ServerDataStore:GetAsync(Server)
        --local newdata = getUpdatedData(serverdata)
        local newdata = serverdata
        for i,v in pairs (newdata) do
            print(v)
        end
        if not data then
            ServerDataStore:SetAsync(Server, newdata)
        else

        local function updateValue(oldValue)
            return newdata
        end

        ServerDataStore:UpdateAsync(Server,updateValue)
        end
        warn("server data was successfully saved")
    end


return module