getLevel() not working properly

When I use .getLevel(); to get the player's experience level it works improperly, but only in some cases. In the events PlayerJoinEvent and EnchantItemEvent, it works properly and gets the players experience level. In other methods it returns the total experience the player has gained since last death as if I had used .getTotalExperience();

In this plugin, I am creating a scoreboard that will display the player's experience level to them, here are my event handlers.

Code:

@EventHandler
    public void onPlayerJoin(PlayerJoinEvent e) {

        Scoreboard board = Bukkit.getScoreboardManager().getNewScoreboard();

        Objective objective = board.registerNewObjective("experience", "xp");

        objective.getScoreboard().resetScores("experience");

        objective.setDisplaySlot(DisplaySlot.SIDEBAR);

        objective.setDisplayName("Experience Leaderboard");

        e.getPlayer().setScoreboard(board);

        e.getPlayer().getScoreboard().getObjective("experience").getScore(e.getPlayer().getDisplayName())
                .setScore(e.getPlayer().getLevel());

    }

    @EventHandler
    public void onXPChange(PlayerExpChangeEvent e) {

        e.getPlayer().getScoreboard().getObjective("experience").getScore(e.getPlayer().getDisplayName())
                .setScore(e.getPlayer().getLevel());

        e.getPlayer().sendMessage("XP Changed");

    }

    @EventHandler
    public void onDeath(PlayerDeathEvent e) {

        if (e.getEntity() instanceof Player) {

            e.getEntity().getScoreboard().getObjective("experience").getScore(e.getEntity().getDisplayName())
                    .setScore(e.getEntity().getLevel());

            e.getEntity().sendMessage("Death Occured");

        }

    }

    @EventHandler
    public void onEnchant(EnchantItemEvent e) {

        e.getEnchanter().getScoreboard().getObjective("experience").getScore(e.getEnchanter().getDisplayName())
                .setScore((int) e.getEnchanter().getLevel());
      
        e.getEnchanter().sendMessage("Item Enchanted");

    }

EDIT:
The scoreboard works properly for a few seconds when loaded, but then randomly updates and stops working, I have not gotten any of the debug messages I placed in the file, so I am not sure what is causing that to update.

 

try putting debug messages everywhere until you find out