What is a Chaos Crumbling Event?

I’m having trouble separating the completely destroyed pieces of my geometry collection from the pieces that have cracked and are just stuck in place. However, the Geometry Collection component has events that seem to categorize these two. And there’s even a boolean value set to notify you of this event occurring.
The problem is that this event doesn’t work in any way, there’s no documentation, and no one is using it.
How do I use this?