Unreal Engine Issues
Unreal Engine Issues
Cannot Create Game Feature (with C++) module
UE - Foundation - Cpp Tools - UnrealBuildTool - Nov 28, 2022Reproduced 3/3 times. Issue did not occur in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed a Regression. ...
Only exactly matching structures are considered compatible
UE - Gameplay - Blueprint Compiler - Dec 31, 2022in UE 5.0.2 open TestActor Blueprint compile correct. but in UE 5.1 Blueprint Compile not correct ...
Shadow Flickering with Lighting Channels
UE - Graphics Features - Shadows - Oct 27, 2023It looks like static meshes can invalidate large numbers of VSM pages when the geometry and the light are not on light channel 0. ...
Interaction between sublevels and LevelSequences can break actors attachments hierarchy of the sublevel.
UE - World Creation - Worldbuilding Tools - Aug 6, 2025Having a LevelSequence opened and unhiding a sublevel can break the attachment hierarchy of the actors that are inside the sublevel. This also affects to the sublevel asset itself. ...
Crash when changing multiple Landscape Blend Layer nodes from Weight blend to Height blend
UE - LD & Modeling - Terrain - Landscape - Mar 13, 2017A crash occurs when setting the Blend Type for multiple Landscape Layer Blend nodes from Weight Blend to Height Blend. ...
Texture streaming uses ISM component bounds instead of closest ISM instance
UE - Rendering - Architecture - Jan 22, 2026When regular texture streaming is used (not virtual textures), the largest mips are always loaded for ISM mesh textures whenever the camera is inside the bounds of the ISM even if the instances are ...
Crash when opening the static mesh editor
Tools - Jan 26, 2021We have been unable to get an internal repro so far, however we have had quite a few reports from the community reporting this issue. One user also stated this happens when migrating a project over ...
Setting a parent and child static mesh scale to negative effects the rotation on child when Snapped To Floor
UE - Gameplay - Jul 21, 2016Setting a parent and child static mesh scale to negative effects the rotation on child when Snapped To Floor Looks to be directly related to this JIRA: https://jira.ol.epicgames.net/browse/UE-3152 ...
Packaged ThirdPerson template with "start in vr" enabled packaged and launched with "-nohmd" crashes
UE - Platform - XR - Mar 31, 2021The callstack is not XR-specific, it's just the engine trying to secure the audio device on startup, windows failing to return one, and the app not being able to continue safely. The crash does not ...
Crash upon opening packaged game when Event Driven Loader is disabled
UE - Foundation - Core - Apr 26, 2019Packaged games are unable to open when Event Driven Loader is disabled. The error message given is: Assertion failed: !Linker->GetSerializeContext() [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\C ...