Environment Query System (EQS): EnvQuery runtime template object can be created with a non-unique name, corrupting the EnvQueryManager cache

UE - AI - Aug 5, 2025

On file [Engine\Source\Runtime\AIModule\Private\EnvironmentQuery\EnvQueryManager.cpp:812], function UEnvQueryManager::CreateQueryInstance() uses StaticDuplicateObject() to create a new UEnvQuery* (d ...

SSR doesn't reflect Skydome Mesh/Material correctly in Vulkan mobile preview

UE - Platform - Mobile - Aug 4, 2025

5.6[Image Removed] 5.5[Image Removed][Link Removed] ...

LiveCoding fails when DynamicDebugging is enabled

UE - Foundation - Cpp Tools - Live Coding - Aug 4, 2025

If DynamicDebugging is enabled, the output extension in the LiveCoding manifest is ".alt.dll", but the actual built DLL does not include ".alt" in its name. This mismatch causes an error. ...

EncompassesPoint always returns fase on ANavMeshBoundsVolume due to missing BodyInstance

UE - AI - Aug 3, 2025

When calling EncompassesPoint on an ANavMeshBoundsVolume, the method always returns false even if the target point is clearly within the visible volume bounds. This occurs because AVolume::Encompas ...

SkinWeightsAsVertexMask in DeformerGraph does not respect SkinWeightProfile

UE - Anim - Rigging - Deformer - Aug 1, 2025

The WeightBuffer passed to the shader does not reflect the SkinWeightProfile. The work around is : void FOptimusSkinWeightsAsVertexMaskDataProviderProxy::GatherDispatchData(FDispatchData const& In ...

start/end state notify events can be sent every frame on dedicated server builds

UE - Anim - Gameplay - Aug 1, 2025

The problem is that UCharacterMovementComponent::MoveAutonomous can tick the anim instance and dispatch notifies outside of the regular skeletal mesh component tick. But when MoveAutonomous calls T ...

Crash when displaying lumencards on map with many objects

UE - Graphics Features - Lumen - Aug 1, 2025

There is a thread conflict between FRDGBuilder execution in Background Worker and LumenVisualizer's LumenCard add/delete process. When lumen cards are displayed in a scene with many objects, a crash ...

Anamorphic Squeeze Factor causes a blocky Depth of Field issue on AMD Hardware

UE - Graphics Features - Jul 30, 2025

When using the Anamorphic Squeeze Factor on a camera on AMD RDNA3 and RDNA4 hardware, blocking artefacts may be seen depending on the extent of the blur. The peripheries of the viewport appear to be ...

Mover Spawning and teleport issues related to World::EncroachingBlockingGeometry and CharacterMesh collision

UE - Gameplay - Player Movement - Mover - Jul 30, 2025

Setting a Skeletal meshes collision preset to CharacterMesh introduces problems with spawning and teleporting a pawn driven with Mover.  ...

UText3DComponent's Text property access: UE 5.3 broke BP setters. UE 5.6 unneccessarily broke compatibility and incorrectly removed BP getters.

UE - CoreTech - Jul 30, 2025

Class UText3DComponent from the "Text 3D" plugin contains a "FText Text" member which must be set through a SetText() function to correctly update the component's internal state. Up to UE 5.2, "Tex ...