Ensure occurs while duplicating world partitioned level by WorldPartitionRenameDuplicateBuilder commandlet

UE - World Creation - Worldbuilding Tools - World Partition - Aug 21, 2023

The level seems to have been successfully copied. ...

Crash happens when changing Animation Mode to any other mode while a Control Rig is selected.

UE - Anim - Rigging - Control Rig - May 17, 2022

This is a regression. Tested in //UE4/Release-4.27 CL18319896 An assertion is thrown when changing Animation Mode to any other mode while a Control Rig is selected. ...

Editor crashes if an interface array variable is reset in the Detail's Pane

UE - Gameplay - Blueprint - Apr 27, 2016

The editor will crash if an array of interfaces is reset using the "reset values" button (yellow arrow) in the Detail's Pane of the editor. Frequency: 4/4 Crashreporter: N/A Regression? (No), is ...

Trace Hit.Z varies strangely based on trace start/end Z

OLD - Anim - May 8, 2017

The Z value of a trace hit will vary based on the Z value of the start/end points of the trace. The larger the start/end Z range, the larger the variance of Hit.Z values. ...

Lighting channels not working as expected when enabling Ray Tracing Shadow

UE - Graphics Features - Lumen - Oct 13, 2020

Non-Ray Tracing Shadows are only cast from lights on meshes assigned to the same Lighting Channel. When enabling Ray Tracing Shadows this is not the case. Lights will still cast Ray Tracing Shadows ...

Alembic Import with empty first frame will cause the editor to crash

UE - Gameplay - Aug 10, 2016

The editor will crash when importing an Alembic file with an empty first frame. ...

Crash when calling UPoseableMeshComponent::CopyPoseFromSkeletalComponent() from Actor's Tick while unregistering

UE - Anim - Runtime - Apr 26, 2023

Under certain conditions, it appears that the function UPoseableMeshComponent::CopyPoseFromSkeletalComponent may crash because the BoneSpaceTransforms obtained from the source component are empty, p ...

Infrequent WaitingTask->IsCompleted crash related to FNiagaraSubmixListener closing QAGame -game

UE - Audio - Submixes - Jan 5, 2022

Infrequent WaitingTask->IsCompleted crash related to FNiagaraSubmixListener closing QAGame -game Unsure if related to [Link Removed] it was spawned from a group of oodle crashes and this is distinc ...

Editor Crashes when importing some FBXs with multiple Material IDs in 4.14.2

UE - Editor - Content Pipeline - Import and Export - Jan 5, 2017

This is a regression in behavior between 4.14.1 and 4.14.2! The editor will crash when importing FBX meshes that have multiple material ID assignments. If it's a single material ID it will import w ...

GAS: Initial OnRep_SpawnedAttributes from DefaultStartingData clears attribute values for already replicated ActiveGameplayEffects

UE - Gameplay - Gameplay Ability System - Oct 23, 2024

Context The property 'DefaultStartingData' in AbilitySystemComponent can be configured from blueprint to spawn default attribute sets. This happens OnRegister. For runtime spawned actors like pawns ...