Progressive Cell Fracture

Hello, I have a scene in which a big text falls onto a lot of monsters that I’d like to fracture while the text falls.
Text is an animated rigid body.
My problem is that the monsters are not breaking progressively when they are hit by the text, the start to break as soon as the first monster gets touched.
Is this normal and inevitable?

I tried both joining all the monsters together and fracture but I also tried to fracture the single monsters, the result does not change.

Any hints?