Issue with PLA Editing inside another PLA causes Z-Fighting or Mesh Disappearance.

When editing a Packed Level Actor (PLA) that is inside another PLA, z-fighting or mesh disappearance will occur. More specifically, it is seen when duplicating a mesh inside the PLA, upon saving the PLA the issue would happen. This issue is temporarily fixed upon restarting, but would occur again if the inside PLA is edited again.

-Create a new, empty project and scene.
-Add a cube and a cone to the scene.
-Combine the cube and cone into a single PLA.
-Duplicate this PLA in the scene.
-Combine the two PLAs into a new parent PLA.
-Right-click on the parent PLA, navigate to Level → Edit, and then edit the child PLA.
-Duplicate the cone inside the child PLA, press ESC, and save the changes.

Result:
-Z-fighting appears on the geometry of the PLAs.
-Occasionally, some meshes disappear entirely.