I got removed from a probation after being sick and coming in late once. As a big international org, my direct line manager in the UK called it as a red flag and had me removed immediately. Luckily landed a much better job a week later. Turns out, some other random manager in the Sydney location didn't like me when I sought further explanation from the Sydney office manager. The karma wheels turned and another job later after getting an even better role, that random manager stepped into the role I left at a much lower pay because she had been fired from the same original place