Custom Inventory Configuration gets reset when opening Island Settings in Fortnite

Summary

The Custom Inventory Configuration set in UEFN is automatically cleared when opening the Island Settings in the Fortnite client.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

Open the project in UEFN.
Go to Island Settings → Player → Inventory.
Set Custom Inventory Configuration to BR.
Launch the island in Fortnite.
Open Island Settings in the Fortnite client.
Navigate to Player → Inventory.
Return to UEFN / inspect the Island Settings.

Expected Result

The Custom Inventory Configuration has been reset/cleared. It is no longer set to BR.

Observed Result

This breaks the Custom Items & Inventory system. In Verse, the player no longer has the expected Fortnite inventory subcomponents, including the weapon hotbar.
As a result, custom weapons cannot be added through the inventory/hotbar system.

Platform(s)

PC