Unreal Engine Issues

Linked graphs that are linked via post process anim bp BeginPlay can be lost on reinitialization of anim instance

Certain codepaths in USkeletalMeshComponent::InitializeAnimScriptInstance can cause linked anim graphs that are running in Post Process anim bps to be unlinked.  The problem only occurs when the lin ...

Distributed HLOD builds always fail for projects not under the Engine Root

In BuildProject.txt, to make relative path to the project outside the engine root, all paths contains “..” after action command directory. D:/dev/UnrealEngine-5.5.0//HLODTemp/f09bf0f5/HLODBuilder0 ...

Some instances spawned by NeagaraDataInterfaceChaosDestruction breaking event will be set location to the world origin

 The following code can often be found in UNiagaraDataInterfaceChaosDestruction.const int32 ParticleID = ParticleIDParam.GetAndAdvance() - LastSpawnedPointID + 1; The LastSpawnedPointID is usual ...

GeometryCollectionActor SetSimulatePhysics false does not stop Physics Simulation

If the GeometryCollectionActor (GCA) is simulating physics, calling SetSimulatePhysics(false) does not stop the simulation. If the simulation is paused, calling SetSimulatePhysics(true) does as expe ...

Character jumping between two moving platforms will incorrectly inherit the sum of both platform velocities

A character standing in a base will match its velocity to the base's velocity. If that character jumps into another base its velocity will be added to the new base's velocity and the character will ...

Shadow Maps performance issue with 5.4 in comparison towards 5.3

Shadow depths performance for non-VSM in certain scenes, notably those with rect lights and meshes that are set to movable, went from ~2ms to ~18ms going from UE 5.3 to UE 5.4. Setting the movable a ...

BakedSourceTexture missing from Sprite in packaged game

The UPaperSprite::BakedSourceTexture will be nullptr in a packaged game if the sprite is not referenced by the UGameInstance.  The attached sample project demonstrates this scenario. ...

Windows Game Input - DualSense/DualShock controllers DPad button repeat events behave unexpectedly

check fail in RegisterLevelInstance when calling Build HLOD with PLA

The necessary conditions to trigger the issue: The WorldPartionHLOD actor to rebuild must reference a packed level actor The packed level actor must be loaded in the map when rebuilding the HLOD ...

After changing SupportedAgent settings, old Recast nav mesh actor is not deleted when saving map with External Actors (OFPA) enabled

Context Recast lets you configure multiple agent types in Project Settings > Navigation System > Supported Agents. When agents have unique settings such as agent radius, building a nav mesh results ...