Editor freezes if you close many opened tabs in a window

Summary

This only happens in UEFN, not UE5. When you have lots of things opened in a window, then you close it, UEFN will freeze based on the number of opened tabs.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

UI/Tools

Steps to Reproduce

Go to the content browser and open prop definitions in a new window.
Keep stacking tabs until you are more than 20
Close the window therefore all tabs in it.

Expected Result

Window closes, you can continue working

Observed Result

UEFN will freeze for a short period of time that relates to the amount of tabs that window had

Platform(s)

PC