Jumping years

I was playing the Casse
EB1.1 with EB, all fixed applied and a new campaign, so the non-retroactive ones are working too.

It was winter 237BC.
The next turn it was spring 262BC.
The next summer 236BC.

Any idea how this happened?

Did you start a new campaign directly after another campaign without rebooting the game?

Nope, I always reboot before I start a campaign/reload a savegame.

Sometimes after a played battle the script needs reactivating again, and when it turns off the years can go a bit wild. Did you play a battle in between turns? And did the year change affect the gameplay in any way?

Neither.
I loaded the game in summer 238
I started the script.
Just played my campaign on the campaign map.
Suddenly it's 262!
I click on a city to see if the script may have been deactivated. Not the case.
I even checked the victory conditions were still working. Yes, cities started blinking.
Said, oh well, let's see what the next turn brings.
Back on track.

That is such a bizarre thing. 262 (10 years) and 237 (35) years bear no obvious relation to each other.

Typo in the script? The difference is 100 turns or thereabout.

I was thinking about a typo in the script too. That's why I posted this, since apart from a little shock at the time I have no problems whatsoever with my game.

That's really weird. Would have to check the script, if there's an error and not just a random glitch, it should be somewhere between turn 130 and 150.