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Physics mesh problems

I’ve been creating a VR destruction game and im running into problems when detaching components
the way im doing my destruction is by having a mesh split into smaller mesh’s using blender cell fracture and then placing those as components in a blueprint, using the hierarchy as a sort of attachments system. so once ive done enough damage to a component, its get detached and starts simulating physics.

the problem comes when smashing two destructible objects together that are both simulating physics e.g. 2 wooden crates.
some of the components sort of “ghost” where they have no collision.
ive looked at the console but it says “unable to simulate physics on (the ghosting component) but no physics body found”
ive made sure that all meshes im using have collision and they all do.