[SOLVED]My level system wont work? No Errors or anything?

(goin to leave this here incase someone else is having the same problem. The level system works in game, but not in test mode. Seems like roblox updated something)

I was working on a new project and when I got to the level system I ran into a problem. I literally copy pasted the code from an old level system that I did (and i know 100% that this level system worked) and it wont work now. I am completely perplexed by this, I'm not getting any errors at all. Here is my code:

wait(1)
local Player = script.Parent.Parent
local Stats = Player.Stats
local XP = Stats.XP
local Level = Stats.Level


XP.Changed:Connect(function()
    if XP.Value >= Level.Value * 20 then
        Stats.XP.Value = 0 
        Player.Character.Humanoid.Health = Player.Character.Humanoid.MaxHealth
        Stats.Level.Value = Stats.Level.Value + 1
        Stats.StatPoints.Value = Stats.StatPoints.Value + 2
        Player.Character.UpperTorso.LevelUp:Play()
        local Particle = game.ReplicatedStorage.LevelParticle:Clone()
        Particle.Parent = Player.Character.UpperTorso
        Particle.delete.Disbled = false
    end
end)

thanks for reading. Did roblox break something maybe?