NPC Spawner BP Static Mesh Parent Socket not working during game

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Character

Summary

When adding a static mesh under a skeletal mesh then assigning the Parent Socket everything works great in the bp and in edit mode but when in game mode the static mesh is connected to root not the parent socket chosen.

Steps to Reproduce

make a npc spawner
choose custom character
make a character bp
choose a skeletal mesh
Add a Static mesh child
assign it to a parent socket of the skeletal mesh
launch session

Expected Result

The static mesh should attach to the socket like in the bp or edit game mode

Observed Result

Static mesh doesnt attach properly

Platform(s)

pc

The parent socket property in blueprints works for non custom npcs but not custom npcs. This issue is blocking us releasing our map.