Solved 1 line keeps disappearing from the scoreboard.

Hello, I am having problem that only 1 blank line on the scoreboard keeps disappearing for no reason. I have no idea what causes it, but when I type something to there, then the line appears... Any reasons, why?

Code:

                    arena.getScoreboard().getObjective("Obj").getScore("§fTime: §a" + timeString(arena.getTime())).setScore(3);
                    arena.getScoreboard().getObjective("Obj").getScore("").setScore(3); // << this line is disappearing
                    arena.getScoreboard().getObjective("Obj").getScore("").setScore(2);
                    arena.getScoreboard().getObjective("Obj").getScore("§fPlayers: §a" + arena.getPlayers().size()).setScore(1);

//EDIT: It doesn't wanna allow me to enter 2 blank lines. Blank line with score 3 is still disappeared even when I add new score with text between them.

Solved!
Thread, what fixed my problem:
https://bukkit.org/threads/scoreboard-issues.319636/

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