It appears that random events are enabled. Those are normally turned off for BOTMs...
More often than not, random events are switched off, but sometimes we leave them on. This follows feedback we've had in the past that quite a few players don't like random events, but a some players like them. Personally, I tend to always switch random events off if it's a difficult (immortal or deity) game - because that's when they can be irrecoverably game-breaking - but I'm more likely to leave them on in easier games.