in studio my game purchasing works perfectly fine, but in game it doesn't? [closed]

Here are some videos showing it, look at my cash when I purchase the cars.

In Studio --

https://gyazo.com/09b5d3b41ac3dadbe0abc7d6e9b7a006

Out of studio --

https://gyazo.com/4005d53a5913bbbd73ae9bf5e32d9d7d

Out of studio, it takes the cash away then adds it back????

if you need to know more tag me in the discord..

local DSService = game:GetService('DataStoreService'):GetDataStore('Car00071isaproatscripting10202')
game.Players.PlayerAdded:connect(function(plr)
    -- Define variables
    local uniquekey = 'id-'..plr.userId
    local leaderstats = Instance.new('IntValue', plr)
    local savevalue =  Instance.new('IntValue')
    leaderstats.Name = 'leaderstats'
    savevalue.Parent = leaderstats
    savevalue.Name = 'Cash'

    -- GetAsync
    local GetSaved = DSService:GetAsync(uniquekey)
    if GetSaved then
        savevalue.Value = GetSaved[1]
    else
        local NumbersForSaving = {savevalue.Value}
        DSService:SetAsync(uniquekey, NumbersForSaving)
    end
end)

game.Players.PlayerRemoving:connect(function(plr)
local uniquekey = 'id-'..plr.userId
local Savetable = {plr.leaderstats.Cash.Value}
DSService:SetAsync(uniquekey, Savetable)    


end)

game.ReplicatedStorage:WaitForChild("CheckPrice").OnServerInvoke = function(player, NameOfCar)

    return game.ServerStorage.Cars:FindFirstChild(NameOfCar).Price.Value
end

game.ReplicatedStorage:WaitForChild("SpawnCar").OnServerEvent:Connect(function(player,NameOfCar)
    local car = game.ServerStorage.Cars:FindFirstChild(NameOfCar):Clone()
car.PrimaryPart = car.Chassis
car:SetPrimaryPartCFrame(player.Character.HumanoidRootPart.CFrame + Vector3.new(0,0,15))
car.Parent = workspace
car:MakeJoints()
car.Name = player.Name.."'s "..NameOfCar
end)



local ReplicatedStorage = game:GetService("ReplicatedStorage")
local createPartEvent = ReplicatedStorage:WaitForChild("CreatePartEvent")
createPartEvent.Name = "CreatePartEvent"

local function onCreatePartFired(player)
    local PriceOfItem = game.ReplicatedStorage:WaitForChild("CheckPrice"):InvokeServer(script.Parent.Parent.StarterGui.PurchaseGUI.ScrollingFrame.Jugatti.Name)
    game.Players[tostring(player)].leaderstats.Cash.Value = game.Players[tostring(player)].leaderstats.Cash.Value - PriceOfItem
            script.Parent.Parent.StarterGui.PurchaseGUI.ScrollingFrame.Jugatti.Purchased.Value = true
end

createPartEvent.OnServerEvent:Connect(onCreatePartFired)