DM chunk hitting other DM = no "hit event"

As far as I understand destructible chunks - does not generate a hit event - when colliding.

As you can see in the image i attached I need chunks to fall to a layer and fracture that layer.
I can get it to fracture when just using two simple physical sphere that just fall to hit- as long as i enable “Generate hit event” on it.
But nothing happens when my chunk from DM (the yellow selected object in image) falls and hits.

I have setup two DM with Nvidia Physx Lab and tried a lot of things both in Physx and Unreal - but no settings seem to work as far as i can see.

So is there another way?
I dont need it to collide - as long as i can somehow get a overlay/hit position from each chunk hitting/overlapping. Then i could create radial damage from that position.

Any help will be extremely appreciated … :slight_smile:
I tried different setting in phys material also - but i have not tried using physical assets - im not sure if/how that will work.
Maybe something about assigning sockets? but how to know when it hits?

I have not yet found the answer myself - so here i could really use some help ? :slight_smile: any suggestions are most welcome.

Thanks