Naaah, rather call it lucky aswell, cuz I repeated last year and it coincided to be the last one of almost all my extracurriculars, so this year got it free to focus on studying to enter university
I've heard of that before, but most of the time I've seen people just stay at the same level when they get held back, and so on throughout there grade. But ofcourse it changes when you get into a higher grade. You are lucky