Solved Scoreboard dissapearing

I recently made a post about a scoreboard flashing, and I resolved it in a way, but now it's coming back again. I decided to redo my code for a buffer. The scoreboard appears for one tick (the rate at which I'm updating the scoreboard), and then disappears. I know this can occur when there are too many scores on the scoreboard, but I don't seem how this could happen with this code.* I've been staring at my code for over an hour, dumbfounded on why it's disappearing.

*: EDIT: I have just found that the scoreboard is disappearing when not even adding the scores to it... Now I'm really confused.
My code:

Code:

public ArrayList<PlayerScore> toRemove = new ArrayList<PlayerScore>();
    public ArrayList<PlayerScore> toKeep = new ArrayList<PlayerScore>();

Code:

    public void modifiedScore(Scoreboard board, String string, String prefix, String suffix, Objective objective, int highest, int listDown) {
        PlayerScore current = new PlayerScore(string, prefix, suffix);
        boolean add = true;
 
        for (PlayerScore ps : toRemove) {
 
            if (ps.allValues().equalsIgnoreCase(current.allValues())) {
                add = false;
                System.out.println("same");
                break;
            }
        }
 
        if (add) {
 
            OfflinePlayer op = Bukkit.getOfflinePlayer(string);
 
            Team team = null;
            if (board.getTeam("team" + listDown) != null)
                board.getTeam("team" + listDown).unregister();
            team = board.registerNewTeam("team" + listDown);
 
            team.setPrefix(prefix);
            team.setSuffix(suffix);
 
            team.addPlayer(op);
 
            Score score = objective.getScore(op);
            score.setScore(highest - listDown);
            toRemove.add(current);
            toKeep.add(current);
            System.out.println("adding");
        }
    }

Code:

    public void updateScores(Player player) {
        Scoreboard board = playerScoreboards.get(player.getName());
 
        Objective obj = board.getObjective("board");
        Objective buffer = board.getObjective("buffer");
 
        updateObjective(buffer, board, player, true);
        buffer.setDisplaySlot(DisplaySlot.SIDEBAR);
 
        swap(obj, buffer);
        updateObjective(buffer, board, player, true);
 
        player.setScoreboard(board);
        playerScoreboards.remove(player.getName());
        playerScoreboards.put(player.getName(), board);
 
    }
 
    public void swap(Objective obj, Objective buffer) {
        Objective t;
 
        t = obj;
        obj = buffer;
        buffer = t;
    }
 
    private void updateObjective(Objective objective, Scoreboard board, Player player, boolean b) {
 
 
        if (b) {
            Iterator<PlayerScore> it = toRemove.iterator();
            while (it.hasNext()) {
                PlayerScore ps = it.next();
                for (PlayerScore ps1 : toKeep) {
                    if (!toRemove.contains(ps1)) {
                        board.resetScores(ps.getString());
                        it.remove();
                        System.out.println("removed + " + ps1.allValues() + " + " + ps1.allValues());
                    }
                }
 
            }
        }
 
        System.out.println(toRemove.size() + ", " + toKeep.size() + " ::::: 2");
 
        toKeep.clear();
     
        int scores = 5;
        int highest = MemeCraftSG.getPluginInst().getHelper().getAvailibleMaps().size() + scores;
 
        modifiedScore(board, " ", "", "", objective, highest, 0);
        modifiedScore(board, "Time Remaining", generateSpaces(5) + "§b", "§7:" + generateSpaces(5), objective, highest, 1);
        modifiedScore(board, "§l" + getCountdownTime(), generateSpaces(5), generateSpaces(5), objective, highest, 2);
        modifiedScore(board, "  ", "", "", objective, highest, 3);
        modifiedScore(board, "§bMaps§7: ", generateSpaces(5), generateSpaces(5), objective, highest, 4);
 
        for (int i = 0; i < MemeCraftSG.getPluginInst().getHelper().getAvailibleMaps().size(); i++) {
            String maps = MemeCraftSG.getPluginInst().getHelper().getAvailibleMaps().get(i);
            String color = "§7";
 
            if (MemeCraftSG.getPluginInst().getHelper().getVotedMap(player.getName()).equalsIgnoreCase(maps))
                color = "§e";
 
            modifiedScore(board, "§b" + maps, generateSpaces(5) + color + "» ", "§7: " + MemeCraftSG.getPluginInst().getHelper().getTimesVoted(maps) + generateSpaces(5), objective, highest, scores + i);
 
        }
 
        objective.setDisplayName("§b§lVotes");
 
        System.out.println(toRemove.size() + ", " + toKeep.size() + " ::::: 1");
 
    }

I have added several debug messages, and this is the output:


(and it continues)

Help is appreciated. Thanks!

bump?

Solved it by creating a list for each objective instead of just one...

EDIT by Moderator: merged posts, please use the edit button instead of double posting.