Placing 'Groom' asset into scene results in assertion failed

UE - Graphics Features - Feb 10, 2020

Dragging a groom asset into the level results in a crash. Link to Project: [Link Removed] Tested in:  4.25 CL#11223911 ...

Memory leak when Lumen is disabled but r.MeshCardRepresentation=1

UE - Graphics Features - Lumen - Jul 29, 2024

When Lumen is disabled, but the cvar "r.MeshCardRepresentation" is set to 1, Lumen will continuously enqueue object removal from the Lumen Scene, without ever emptying the array of primitives to rem ...

Option "Use Mouse for Touch" does not work correctly when running the game in "Standalone" or "New Editor Window (PIE)" modes: Virtual joystick does not appear and mouse cursor is incorrectly hidden while captured.

UE - Gameplay - Input - Apr 1, 2025

The Editor provides option "Project Settings – Engine – Input – Mouse Properties – Advanced – Use Mouse for Touch" to allow testing virtual joysticks and other touch controls with the mouse. When ru ...

Cannot compile nativized Blueprints containing a delegate signature that includes a TMap (paired) type as a parameter.

UE - Gameplay - Blueprint - May 15, 2018

Paired types (e.g. TMap) in a delegate signature do not compile after nativizing a Blueprint class containing it due to the macro expansion and comma inside the template spec between key and value t ...

Crash While Running Project With d3ddebug Enabled (fix provided)

UE - Graphics Features - Mar 6, 2017

A licensee encountered a crash during InjectTranslucentLightArray: according to them they fixed the issue in ShadowProjectionCommon.usf: /** Cube map texture. */ TextureCube<float> ShadowDepthCub ...

World partition mini map fails to build with an Unhandled Exception while using r.Raytracing.Nanite.Mode=1

UE - Graphics Features - Jan 31, 2023

This is a regression. Tested in //UE5/Release-5.0 CL20979098 Build mini map fails with an Unhandled Exception while r.Raytracing.Nanite.Mode=1 is enabled in the DefaultEngine.ini. ...

Forward Shading: Scene Capture 2D crash when assigning a RGB Capture Source

UE - Graphics Features - Dec 12, 2016

When using Forward Shading for the project, if you assign a source target to a SceneCapture2D and use either BaseColor in RGB or Normal in RGB the editor will crash. Tested with: Broken: 4.14.1 B ...

Delta struct serialized fast arrays replicating new elements with no changelist

UE - Networking - Jun 14, 2021

There is a scenario where delta struct serialized fast arrays can replicate changes that introduce additional elements to the array, but without changelists containing the new data. This needs furt ...

Certain UPROPERTY values are not updated during auto-recompile

UE - Gameplay - Blueprint - Aug 4, 2016

Sometimes manual recompile is required to make a blueprint actually recompile data-only changes, but not always. If the last manual compile was with default values, then changes are not updated. If ...

Missing libomp140 DLL causing crashes in Hair Card Generator plugin

EA Motive has run into a crash when using the hair card generator plugin. A missing DLL is preventing them from creating hair cards according to the initial investigation from their engineers. More ...