Unreal Engine Issues
Unreal Engine Issues
LODs screen sizes in legacy assets are incorrectly converted to all have the same value on load
UE - Editor - Content Pipeline - Sep 11, 2025When loading a static mesh asset created in an old version of Unreal (e.g. 4.10), all LODs have their Screen Size property set to the same value (approximately 1.5). This happens because the static ...
A Client connected to a Server that then destroys the session and rejoins will be disconnected after a short time
UE - Networking - Dec 8, 2015A Client connected to a Server that then destroys the session and rejoins will be disconnected after a short time. Unable to reproduce in a new project, however this has been reported multiple times ...
Foliage lightmaps for LODs does not look correct
UE - World Creation - Worldbuilding Tools - Foliage - Jun 21, 2016When using the foliage tool with any mesh that has a LOD the lightmap generates artifacts for the instance. The base LOD will have correct looking lightmaps, however when pulling back and seeing the ...
[CrashReport] Fatal error: Cast of nullptr to Object failed
UE - Gameplay - Oct 5, 2017This is a common and longstanding crash that has affected many users since at least 4.11. Source context not available (error in user code?). User DescriptionsI was duplicating a Set function in c ...
Crash when hiding DataTable window and saving in DataTable Editor
Tools - Nov 20, 2017When adding rows to a DataTable that has its DataTable tab hidden or exited out, the Editor will crash when adding a row to the DataTable. This crash happens in 4.17, 4.18, and 4.19. ...
[CrashReport][GPUCrash] UpdateRadianceCaches
UE - Rendering - Graphics Features - Ray Tracing - May 19, 2025#31 crash out of 7783 in UE 5.7.4 on Windows#3 crash for UE - Rendering - Graphics Features in UE 5.7.4 on Windows#1 crash for UE - Rendering - Graphics Features - Ray Tracing in UE 5.7.4 on Windows ...
CRITICAL: Regression: CRASH: SHOOTERGAME: Client crashes when using ServerTravel command
UE - Networking - Sep 17, 2014Update (5/4/15): New repro steps using Main (//depot/UE4/Promotable-CL-2535351): 1. Create a new Blueprint project 2. Create 3 new Levels: MainMenu, Lobby, and Level 3. Create 3 new GameModes: Main ...
Delay Node not persisting through Concatenator Node in Sound Cue Editor
UE - Audio - Mar 11, 2016Sound Waves do not continue to play when using a delay node before a Concatenator. I tested this issue in the binary releases of 4.9.2 and 4.10.4 and it did not occur in either version. ...
Crash when rendering cinematic in a Separate Process without "-NoLoadingScreen" cmd argument
UE - Anim - Sequencer - Jul 5, 2016Crash when rendering cinematic in a Separate Process without "-NoLoadingScreen" cmd argument. Occurs in 4.12 and 4.13 in both Matinee and Sequencer Error message: Assertion failed: SizeX > 0 && S ...
Graphical Artifacts in Editor with Macs using Certain AMD Graphics Cards
UE - Graphics Features - Sep 17, 2015Users are reporting black and splotchy like graphical issues in their projects when working on a Mac and using an AMD graphics card. The user in the link provided mentions, "that UE 4.8.3 is withou ...