Yes, the label normally works fine. I found the problem.
I have the same script which I put it on 15 prefabs, which I spawn when I enter the scene and 5 objects already in game.
If I leave the script on any of the 5 objects already in game, it creates this problem.
If I remove it and leave it only on the 15 spawned prefabs than it works perfectly.
Anyone else encountered this ?