Unreal Engine Issues
Unreal Engine Issues
Crash when adding Actor Components to a Spawnable Actor in Sequencer while it is despawned
UE - Anim - Sequencer - Feb 26, 2026After migrating our project from UE 5.5 to 5.7, we are experiencing a consistent engine crash in the Sequencer. The crash occurs specifically when a user attempts to add a component to a Spawnable A ...
Enhanced Input: RebuildControlMappings loses information about the last state of a trigger
UE - Gameplay - Input - Feb 25, 2026When two input actions are bound to the same "pressed" key in the same IMC & one is set to RebuildControlMappings, the input of the other will trigger indefinitely while the key is held down. ...
Visual discrepancy between lighting in Cloud Presenter and editor viewport
TM - Rendering - Feb 24, 2026Reported in SF [Link Removed] In this user’s scene, the lighting in the Cloud Presenter does not match the lighting in the editor viewport. The Cloud scene is notably darker than the editor. The s ...
Unstable automation tests in "Standard Tests" list.
UE - Rendering - Architecture - Feb 20, 2026The two following automation tests found in the "Standard Tests" list hit exceptions & cause the editor to crash:System->Physics->Interface->BodyInstanceShaders->ShaderPreprocessor->BuiltInMacros ...
anim notify states are triggered when updating thumbnails
UE - Anim - Runtime - Feb 19, 2026The issue is that FAnimationSequenceThumbnailScene::SetAnimation calls referesh bone transforms which will trigger notify states present at the midpoint of the animation (as the thumbnail code sets ...
OCIO + nDisplay not producing expected output in Disguise
UE - Virtual Production - Rendering - Color - Feb 19, 2026Based on [Link Removed] OCIO + nDisplay not producing expected output The issue is just that when using UE 5.6 or later the resulting colour looks off compared to what 5.5 and pevious versions wou ...
The hierarchy of Actors in LevelInstances can break when using BPs as parent
UE - World Creation - Worldbuilding Tools - Level Instances - Feb 18, 2026The hierarchy of a LevelInstance actors (Outliner) will break when cooking. The source is the call to AActor::RerunConstructionScripts in FWorldPartitionLevelHelper::MoveExternalActorsToLevel. The ...
Empty View Sets created when creating new images or panoramas
TM - Tools - Feb 16, 2026Reported in SF [Link Removed] Starting in TM 2025.2, when creating new images or panoramas, a new View Set is created with each new image or panorama. These View Sets will not have any names and ca ...
Compiler Error when including InstancedSkinnedMeshComponent.h
The UE_EXPERIMENTAL macro is not used correctly in InstancedSkinnedMeshComponent.h. It should come after the 'class' keyword & before UInstancedSkinnedMeshComponent as specified in the documentation ...
"Move to Level" of Landscape Tool leads component scale mismatch
UE - Graphics Tools - Terrain - Landscape - Feb 12, 2026In UE 5.7.2, when moving a Landscape Component to a sub-level using Landscape Mode > Manage > Move to Level, the proxy transform is not synchronized with the root Landscape when the KeepWorldTransfo ...