I’m currently using 5.6 and it’s happening there.
When manipulating a Geometry Collection component repeatedly with a Field system, the pieces become very “stiff” and eventually the simulation stops. The position is fixed and rotation is barely possible.
Once in this state, the state can no longer be overridden using the field’s Dynamic State. That is, it is fixed, but internally it is fully simulated.
So far, we have confirmed that this occurs with external strain, internal strain, and linear force.
This is happening with a Geometry Collection component, and doesn’t seem to happen with Geometry Collections placed directly. Nor does it occur when fractured by direct impact.
