Sweet Jebus I did it ! Here’s the thing :
So, in short, I created an enum with only two states, FirstSight and NotFirstSight (I tried to do with a boolean, but or I messed up the thing, or it wasn’t working. Plus, I would have need two tasks for a boolean to switch on and off, so don’t know if it’s better with an anum or a bool, but it works like that, so I don’t care anymore x) ). And so, when the monster see the player, he enter the first sequence as (I guess x) ) the “basic” state is “FirstSight”, he wait, then turn to “NotFirstSight”, and so go to chase player. I turn back to “FirstSight” in the sequence with the “HaveBeenChasing” decorator, on the left. If I put it before the sequence with the “FirstSight” decorator, it just loop, of course.