Unreal Engine Issues
Unreal Engine Issues
Heterogeneous Volume Actor causes ensures to trigger in Debug builds
UE - Niagara - Aug 24, 2025When a heterogeneous volume actor is used with a volume material in a debug build, the following ensures are triggered: Ensure condition failed: UniformBufferValue || EnumHasAnyFlags(AutomaticallyBo ...
Missing PSO Precaches in the engine
UE - Rendering - Architecture - RHI - Aug 20, 2025A licensee wanted to report some missing PSO Precaching they found, which they have fixed locally: 1. UCableComponent doesn't implement CollectPSOPrecacheData or call CheckPSOPrecachingAndBoostPri ...
Physics Mover: AI movement and collisions can cause sharp increase in velocity
UE - Gameplay - Player Movement - Mover - Aug 19, 2025A pawn using the physics mover and using AI movement can sometimes gain an ton of velocity quickly upon colliding with another physics object. It seems to fix it self and revert back to it's origina ...
Lumen Card Sharing is active on material with custom primitive data
UE - Rendering - Graphics Features - Lumen - Aug 13, 2025The wrong emissive value may be used on Nanite objects with custom primitive data when Lumen card sharing is enabled. This issue can be mitigated with: r.LumenScene.SurfaceCache.AllowCardSharing 0 ...
Copying Gameplay Tag Queries uses paths of instanced objects.
UE - Gameplay - Gameplay Ability System - Aug 8, 2025Copying Gameplay Tag Queries (FGameplayTagQuery) in the editor uses transient instanced object paths, so will no longer be valid when the data is unloaded, making it difficult to save or share queri ...
Environment Query System (EQS): EnvQuery runtime template object can be created with a non-unique name, corrupting the EnvQueryManager cache
UE - AI - Aug 5, 2025On 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, 20255.6[Image Removed] 5.5[Image Removed][Link Removed] ...
SkinWeightsAsVertexMask in DeformerGraph does not respect SkinWeightProfile
UE - Anim - Rigging - Deformer - Aug 1, 2025The WeightBuffer passed to the shader does not reflect the SkinWeightProfile. The work around is : void FOptimusSkinWeightsAsVertexMaskDataProviderProxy::GatherDispatchData(FDispatchData const& In ...
Hardware Raytracing on Lumen can cause a crash on AMD Radeon GPUs
UE - Rendering - Graphics Features - Lumen - Jul 29, 2025Hardware Raytracing support can cause a crash on AMD Radeon GPUs when creating the RT pipeline state. ...
Restoring AnimInstance fails when ControlRig and Motion tracks are consecutive in sequencer
UE - Anim - Anim in Engine - Jul 27, 2025In the Sequencer, Control Rig and Animation tracks are placed consecutively. During the transition, the Animation track captures the AnimInstance state before the ControlRig track's RestoreState is ...