As you can see, the logs all grow the same size.
If you see sharply, the first log starts small and then grows, but the next ones start already large. That's because the FSM is the same and not instantiated on the different prefabs asyncronously: it's exactly the same.
If the FSM was instantiated, they should grow each one with its own size: small at spawn, and then grow.
I tried this over and over with different actions.
In this case, I made the scaling myself, using the Scale Object, but also using Tween I have the same result.
Apparently, the same FSM is managing all the logs, and thus a single Scale variable is used for all of them.
I must say that I COPIED the Unity Object and pasted it to several different objects, so I don't know if this can be the issue, as Unity would assign the exact same identifier to all of them. Not sure about how this works.