UEFN/Fortnite optimization is broken and destroying projects

[ItsEydrian]

Summary

I am experiencing an issue with Unreal Editor for Fortnite. I have been working on a live event map for about 15 months, and until now, everything has been fine in development. However, since the last two Fortnite updates, the game constantly crashes after a certain period of the event, and no, it is not a problem with my project, as it is fully optimized. and I even tested private codes from older versions of the project that didn’t crash, and now they are also crashing. I ran the test on several platforms, both PC and consoles, and they all have the same problem. This is my biggest project, which is now impossible to work on due to this problem.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

When entering the map, the live event should play normally, but when reaching a certain part of it, the game always crashes.

I can’t attach the island code because it’s still in private testing versions.

Expected Result

The game should continue as normal until the end, as it always did before the latest updates.

Observed Result

Fortnite closes on all platforms when it reaches a certain part of the game.

Private island code:

1179-5337-0803

Platform(s)

Every plataform, in every graphic settings, both in DX11 or DX12. I tested in multiples devices.

Oberservation

This is the only message that shows up when the game crashes.

[Jimbohalo10]

hi @ItsEydrian

Please enter the private server code for Epic to be able to look at this.

If on the PC you will have UEFN logs and Fortnite logs and the need to be zipped up and uploaded to have a change of fining out what is wrong

Have you changed the graphics support or changed drivers from DX12 to DX11 to see if this solves the problems.

Have you check if by accident you are using Windows 11 OneDrive to hold the projects.

If assuming you have Unreal Revision control have you downloaded your project to another PC from an earlier backup/sync in December 2025.

[ItsEydrian]

The game crashes in both DX12 or DX11, in other plataforms crashes too. My projects are in the right place. I tested in older versions of the project that works fine, now is crashing, it started only after the last two fortnite updates.

I update the post with the private island code.