How come this works sometimes? PlayerAdded/CharacterAdded??

Seems to work fine, then sometime doesn't even work at all?

game.Players.PlayerAdded:connect(function(player)
local Data = script.Data:Clone()
Data.Parent = player
local CopyData = script.Data.leaderstats:Clone()
CopyData.Parent = player
	--stat() 
	player.CharacterAdded:connect(function(char)	
	if char:WaitForChild("Humanoid") then
		update()	
		wait(6)
		Change_Clothes(char);
		Insert_FallDmg(char); -- Enables Damage_On_Fall	
		Insert_Ragdoll(char); -- Enables Death_Animation
		Insert_Blood(char);
		Insert_Sprint(char);
		Hat_Despawn(char)
		if isAuthenticated(player) then
        print(player.Name .. " has bought the game pass with id " .. passId)
		game.ReplicatedStorage.Weapons.M1014:Clone().Parent = player.Backpack
		player.Data.Inventory.M1014.Value = 1
		char.Humanoid.MaxHealth = char.Humanoid.MaxHealth + 50
		char.Humanoid.Health = char.Humanoid.Health + 50
		end
	end
	end)
	--setupPlayerData(player)	
	CheckBadges(player)
end)