v40.00 Known Issues

[Flak]

Hello Fortnite developers,

During pre-release testing for v40.00, our expanded testing process helped us to identify a number of issues that were fixed before the build was finalized for distribution. However, a few issues were discovered either too late in the cycle, or had to be delayed in favor of more critical issues.

Our goal is to get this list to zero for each new release, but while we work towards that, we want to make sure that developers are armed ahead of time with knowledge of upcoming regressions. Going forward, we’ll continue to share significant known issues in advance of releases, and will aim to do so earlier in the process, giving you the maximum time to prepare.

We know that some of these issues will be disruptive to your development work, and we’re putting processes in place for each new issue to ensure they won’t show up on this list on a future release.

We’ll update this thread as fixes roll out or timelines change. We’ve also included the list of top community requested fixes for pre-existing issues shipping with v40.00.

You can read more about the steps we’re taking to improve UEFN stability and iteration times here.

v40.00 Known Issues:

Unreal Revision Control (URC) Downtime

• We expect roughly 2 hours of downtime for URC while we deploy backend improvements

• URC downtime is expected to begin ~2 hours before Fortnite downtime ends for the v40.00 release

• We’ll update this thread at the beginning and conclusion of URC downtime

Inconsistency in Texture Rendering Causing Black Flickering

• A rendering change in this update causes visible black flickering across building surfaces, walls, and props in some islands, particularly those with dense or overlapping geometry

• The issue is most noticeable while moving through the environment

• Platforms: PC and console. Mobile is unaffected

• Fix targeted for v40.20 (April 16)

Barrier Device May Not Render Correctly

• The Barrier device may not render correctly on some islands which could impact the visibility of in-game boundaries

• Fix targeted for v40.20 (April 16)

Building Materials Not Displaying in UI on Some Islands

• In some islands that have building enabled, the materials resource UI may not appear, preventing players from seeing their current material counts

• Players can still gather and build, but may run out of materials unexpectedly while building

• Players respawning may resolve the issue

• Fix targeted for v40.10 (April 1)

Assets Using ObjectPosition Material Node May Appear Offset or Displaced

• Assets using the ObjectPosition material expression may render in incorrect positions

• This can manifest as misplaced props, UI elements clipping into the ground, or items appearing offset from surfaces

• Workaround: Replace ObjectPosition references in affected asset materials with TransformPosition and optionally, a Vector Parameter

• Fix targeted for v40.20 (April 16)

Text Chat Unavailable on Switch, iOS and Android

• Text chat cannot be opened during matches on developer-made islands on some platforms

• Players can still communicate via voice chat

• Platforms: Switch, Switch 2, Android, and iOS

• Fix targeted for v40.10 (April 1)

Player Icon Not Updating in Some UIs When Changing Outfits

• On some islands, the player icon displayed in custom UI elements may not update when changing outfits using the Phone Booth device

• This is a UI-only issue; outfits update correctly in-game

• Fix targeted for v40.20 (April 16)

Chance of Movement Lag When Sprinting

• Sprinting may cause increasing lag on some islands, particularly when moving at high speed near large numbers of props and materials

• Fix targeted for v40.10 (April 1)

Editor Crash When Placing D-Launcher Device

• Placing a D-Launcher device on an island in UEFN may cause the editor to crash

• This issue does not impact live islands

• Workaround: Avoid placing this device after v40.00 until the fix is available

• Fix targeted for v40.10 (April 1)

v40.00 Top Community Fixes

The following fixes address issues you submitted to us on the forums. Thank you for your patience and for reporting these issues!

• Fixed the issue where projects that were within performance and memory limits were receiving “Cooker Out of Memory” and “Cook Timeout” errors.

  • Forum Report

• Fixed an issue where adding a new mesh component would not update the mesh.

  • Forum Report

• Fixed an issue where the prefab editor would crash when viewing certain prefabs.

  • Forum Report

• Fixed an issue where rafting resources failed to display permanently on the HUD when enabling the Show Crafting Resources option.

  • Forum Report

• Fixed an issue where NPC Character Definition Sessions were not updating NPC Spawners after pushing changes.

  • Forum Report

• Fixed an issue where Proximity chat was not properly attenuating other clients’ voices based on distance.

  • Forum Report

For a full list of all scheduled fixes for 40.00, please refer to this search on the Epic Developer Community Forums.

[Flak]

Stealth Splash Does Not Appear in the Creative Content Menu

• The Stealth Splash is not appearing in the Creative menu

• If updating an island using the Stealth Splash, it will receive validation errors

• Any islands currently using Stealth Splash will still be playable but this item will not be present in-game

• If updating your island, the Stealth Splash should be removed to avoid validation errors until a fix is released

• Fix targeted for v40.10 (April 1)

[gxg_work (x_garren_x)]

Planned URC Downtime has now begun.

We’ll update this thread when we’re back online.

[Flak]

Planned URC Downtime has ended, thank you for your patience!

[Flak]

The unit of speed for the Speed variable in fort_vehicle has been changed from kilometers per hour to meters per second.

• This will now return a different value for the same actual speed, your verse logic might need to be updated.

• This change should have been communicated in advance, and we apologize.

[Flak]

There may be server crashes when using debug commands for in-island transactions.

• A fix is scheduled for 40.10
• If we can get in a fix sooner, we will let you know.

[Flak]

We are investigating an issue where developers are unable to run live edit and/or publish projects due to validation errors. There are a few potential workarounds:

• Resave all actors on the island by selecting them in the outliner, pressing right click, and selecting Save Selected Actor(s)

• Clear Source Files Cache

• Search for LoadErrors: While trying to load package in your UnrealEditorFortnite.log file and look for what assets are failing and either re-save or re-create these files.

• Right-click on the top-most folder in the editor and click “Update Redirector References”

[Flak]

Some In-Island Transactions may fail.

• Failed transactions will not charge V-Bucks or grant items/offers
• We will let you know when we have more information or a fix

[Flak]

The Star Wars™ Narrative and Roleplaying template may show a validation error in 40.00.

• The fix is to update the Quest Complete Pop-up Dialogue device to point to the correct widget file: UW_UI_Popup_Lightside. This file is located in: /[Project_Name]/UI/Widgets/Popup/. Add the widget to the Template Override Class option of the Pop-up Dialogue device.

[Flak]

New Verse material code may cause hitching and hanging on some platforms.

• Players may also be kicked back to the lobby.
• We will let you know when we have more information or a fix.

[Flak]

Class effects may remain with a player, even when they move to a class where the effect is disabled.

• We will let you know when we have more information or a fix.

[Flak]

The following items were accidentally included in the 40.00 release and have been removed. We apologize for any inconvenience this may have caused.

• The Seven’s Power Gloves

• Ice King Gauntlets

• Slapperoni Pizza

• Foundation Rift Rifle

• Slapperoni Pizza Slice

• Foundation’s Power Gloves

[Flak]

Improvements to render distance for Creative islands may still be causing increased memory usage.

• We are rolling back this change and investigating other ways to fix or improve Creative render distances.

[Flak]

This has been resolved. Thank you for the reports!

[Flak]

Thanks for your patience. This has been resolved.

[Flak]

3D Grass may cause crashing on some platforms

• We are temporarily disabling 3D Grass on PS4, Xbox One, Switch 2 and PC.

[Flak]

Verse UI actions moved out of Experimental

• The inputs were migrated them fromUnrealEngine.com/ControlInput/UI to /Verse.org/Input/UI.

• Any project using these input actions should be updated to specify the new module.

[Flak]

A number of components have changed this release to allow them to work on all entities, rather than just for items.

• The item_component has had its stacking functionality removed. The following fields have been removed: StackSize, MaxStackSize, MergeableItemComponentClasses, ChangeStackSizeEvent and ChangeMaxStackSizeEvent.

• The item_component no longer implements the has_merge_item_rules interface.

• has_merge_item_rules has been renamed to merge_item_rules. This interface can be added to any class to allow it to affect entity merging and splitting.

• The stackable_component is now available to developers. This component can allow entities to merge into each other to form stacks. The component can be subclassed and the methods CanMergeInto[], MergeInto[] and Split[] overridden to create custom merging and splitting behaviors.

  • This class is abstract and cannot be used without creating a subclass or using the basic_stackable_component (described below).

• Delivered with the new stackable component is the basic_stackable_component subclass. This component allows entities to merge with minimal setup. Add the component to an entity, then set the split_prefab_type to the prefab you wish to merge with/split into. Entities with item_components will trigger the merge logic when they are added to inventories.

• item_details_component has been renamed to description_component.

• item_icon_component has been renamed to icon_component.

• item_rarity_component has been renamed to rarity_component.