Using update() to animate scoreboard

Hello guys,

I am trying to implement a simple animation to my scoreboard. I want it to roll the numbers until it matches the right score. Sometimes I get this: screenshot

Does anyone gets the same problem? Or knows how to fix this? It not the font.

P.S.: the screenshot was NOT taken during the rolling animation.

[SOLVED(?)]Some fonts work and others dont. I’ve just used another font.