I was playing Pulsus on school computers so yeah the keyboards are not the best, but no matter what computer I use and what song I play, I always combo break when I press 2 on the numpad.

It's not only because of my skills, the button show the pressed animation but it still count as a miss.

Is it only me that have this issue?

Did this keep happening even after restarting the game? Also, what level were you playing that you were noticing the issue on?