Landscape Grass Foliage Instances Culling Incorrectly

UE - World Creation - Worldbuilding Tools - Foliage - Feb 20, 2017

Foliage instances are culling incorrectly and seem to cull based off of the landscape components and/or entire foliage clusters. Regression? Yes, this issue does not occur in the 4.14.3 binary rele ...

Package fails to load due to EditorOnly data when launched onto Mac or Windows

UE - Foundation - Core - Jun 28, 2017

LogPlayLevel: QAGame: [2017.06.28-14.09.14:706][ 0]LogLinker:Warning: Unable to load package (../../../QAGame/Content/UMG/UMG_Sprite.uasset). Package contains EditorOnly data which is not supported b ...

Pawns using Floating Pawn Movement will teleport to the location specified in Move To Location

UE - AI - Jul 14, 2015

Pawns using Floating Pawn Movement will teleport to the location specified in Move To Location. From fix CL 2619989: "Fixed FloatingPawnMovement component's issue when controlling AI pawn. Basicall ...

FHLSLMaterialTranslator::GetMaterialEnvironment can crash or not load UMaterialParameterCollections

UE - Rendering Architecture - Materials - Apr 30, 2025

In UE 5.5, the Editor may crash in FHLSLMaterialTranslator::GetMaterialEnvironment when loading materials with Material Parameter Collections, likely due to async loading. Calling ParameterCollectio ...

Lyra 5.5 - LAS_ShooterGame_SharedInput has got a missing reference on InputMapping #1

UE - Gameplay - Input - Jan 27, 2025

The templated Lyra project for 5.5 is missing a reference to IMC_Default_KBM on /ShooterCore/Experiences/LAS_ShooterGame_SharedInput because it looks like IMC_Default_KBM was renamed to IMC_Default. ...

Crash with a migrated BP actor using InstancedStaticMeshComponent

UE - Gameplay - Blueprint - Nov 28, 2016

A licensee reported one of their map crashes on open when they tried to migrate from 4.12 to 4.14. There was no crash in 4.13. This seems to be caused by a certain BP actor that adds InstancedStat ...

GoogleARCoreJavaHelper functions are not correctly exported publicly

UE - Platform - XR - Oct 31, 2018

The jni functions in GoogleARCoreAndroidHelper.cpp are not correctly exported, when we tried to build a Test project it failed with this exception:  java.lang.UnsatisfiedLinkError: No implementatio ...

BuildGraph XML Errors Logged Incorrectly

UE - Foundation - Horde - BuildGraph - Aug 30, 2019

Suggested fix from licensee: After investigation, it seems that the filename is passed as a string instead of a FileReference in Script.cs:84. Fixing the issue seems to be as simple as changing th ...

Cloth jitters in Movie Render Queue renders when temporal sampling is enabled

UE - Anim - Sequencer - MRQ - Dec 6, 2022

The Cloth simulation time step smoothing is interfering with the substepping fix for multi Temporal Samples by changing the very variable DeltaTime and causing some large errors in the cloth simulat ...

Modifying a Static Mesh's "Y" Collision Rotation also modifies "X" and "Z" Rotation

UE - Gameplay - Dec 12, 2016

If the user modifies the "Y" Rotation value of a Static Mesh's Collision, the "X" and "Z" values are changed. The values will move +/- 1 point from their value prior to modifying the Y value. This ...