Unreal Engine Issues
Unreal Engine Issues
Arrays of Soft Object local variables are not captured for reference graph
UE - Gameplay - Blueprint - May 20, 2019This bug comes from https://udn.unrealengine.com/questions/492861/view.html and is a very similar problem to [Link Removed] The issue is that the code that harvests soft object references stored in ...
Static lights become stationary after toggling visiblity of level in packaged build
UE - Rendering - Graphics Features - Jun 11, 2025In 5.5, there is a regression with baked lighting where static lights become stationary lights when a level is hidden and then made visible again. This happens in packaged builds and shows up as sta ...
PlayerCollision visualization incorrect on LandscapeSplineMesh when Nanite is enabled
UE - Rendering - Features - Nanite - Dec 3, 2025From licensee: I’ve found an issue with the visualization of PlayerCollisions when using LandscapeSplineMesh with a mesh that has Nanite enabled. The Chaos collisions shown in the Chaos Visual Debu ...
FZipArchiveCompressTest failing to compile in non-editor Development builds
MetaHuman - Jul 28, 2026`ZipArchiveTest.cpp` fails to compile for non-editor targets in Development configuration. `FZipArchiveCompressTest::RunTest` constructs `FZipArchiveReader`, which is editor only, but that section ...
GPU Particle Emitters not Inheriting Velocity from Event Generator Particle Module
UE - Niagara - Jun 17, 2016When using an Event Generator in a particle emitter that passes velocity for other emitters to inherit, only CPU emitters take on the velocity, and not the GPU emitters. In the test case/project I ...
Staging DLC is reportedly broken
UE - Foundation - Cpp Tools - Automation Tool - Dec 16, 2015According to a licensee, StageFiles() is called with ExcludeWildcard that contains a directory name ("Engine/*") and bRecursive=true when building DLC. This is not supported by Directory.GetFiles(). ...
Framerate drops noticably when using Retopologize tool
UE - LD & Modeling - Terrain - Landscape - Jul 18, 2016Significant framerate drop occurs when attempting to utilize the retopologize tool on landscapes. This occurs even when the landscape has remained completely unaltered. Other landscape tools experie ...
Creating and loading 1001+ instances of level crashes editor
UE - Editor - UI Systems - Localization - Aug 2, 2016Creating and loading 1001+ instances of level crashes editor. Frequency: 4/4 Crashreporter: [Link Removed] Regression (yes) issue (does not) occur in 4.11.2 Notes While not reproduced internall ...
Crash when Deploying to iPad Air with BC4 Texture Compression Setting
UE - Platform - Mobile - Jun 7, 2016App/project crashes when setting a texture's compression settings to BC4 and deploying to the iPad Air. As the user in the op states on AnswerHub, the problem seems to lie with specific texture com ...
Attempting to Duplicate an Asset Copied to a New Folder Spawns the Original Asset
UE - Gameplay - Blueprint - Mar 8, 2016Copying an asset into a new folder, placing an instance of the copy into the level, and then attempting to duplicate that copy by using CTRL+W in the viewport creates another instance of the origina ...