UEFN crashes when having a custom npc definition created and in the content browser

Summary

As stated it took a while to work this out but something keeps crashing my system when i have a npc character def in my content browser.

Video link will be bellow showing everything from start to deleting it to running fine

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

Video

Expected Result

It should crash

Observed Result

It Crashes

Platform(s)

pc