Couple of questions as I start to dig deeper:
Does the standard LineTrace work only against the PhysX scene?
Do Chaos objects exist in both PhysX and Chaos?
Thanks in advance for any insight
[UPDATE]
Here are a few more assumptions/observations ( NOTE: they could be incorrect - feel free to correct)
Looks like the initial collision shape is in PhysX and remains event after being broken in Chaos. The Chaos broken pieces are not in PhysX.
Hence, LineTraces work in the PhysX scene against teh initial unbroken shape.
Note: Each time you create Field System Actor Blueprint, it will need its own unique Field System asset to contain the data for the Field System being created.
This means if you alt-drag an anchor it wont work till you create a new FieldSystem asset for it