Destructible mesh chunks toggle visibility instead of disappearing

I’m using UE4.27.2.

Destructible mesh chunks are not being destroyed when their lifetime expires. Instead, they appear to freeze and lose shadows. In this odd state, they toggle visibility when the origin of the mesh is out of view (see video). If looking at the pivot, the chunks are visible. Otherwise, they are hidden. I’m looking for a solution to just have them disappear altogether.

I’ve fiddled with the parameters, but no success:

The Apex Destruction plugin worked fine until I upgraded to 4.27. I’ve tried reimporting the plugin from UE4’s github with no success.

Help?