Unreal Engine Issues
Unreal Engine Issues
Frame 0 event does not get triggered when using SetPlaybackPosition
UE - Anim - Sequencer - Apr 17, 2018An event at frame 0 of a sequence does not seem to get called when using "SetPlaybackPosition 0" to reset the playback position to the start. This seems to be a regression. 4.17.2, the frame 0 even ...
No Dynamic Shadows on Translucent Materials in iOS Preview
UE - Platform - Mobile - Jul 23, 2018There are no dynamic shadows on translucent materials in the "iOS Preview" for the preview rendering level. Working as intended in 4.16 CL# 3561208, 4.17 CL# 3658906, and 4.18 CL# 3832480. Found i ...
Certain materials are overly bright with Ray Traced Global Illumination denoiser
UE - Graphics Features - Lumen - Mar 14, 2019Ray Traced Global Illumination is causing some materials to glow extremely bright Disabling r.raytracing.globalillumination.denoiser fixes the issue In 4.22 preview 5 binary (5365847) the result i ...
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 ...
The AND node always calculates all inputs
UE - Gameplay - Blueprint - Nov 5, 2015The AND node always calculates all inputs, even if the first input fails as False. Probably related to [Link Removed] (currently unresolved, but a Select node-specific fix is mentioned in the comme ...
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(). ...
Editor crashes when opening several marketplace assets - Assertion failed: !HasAnyFlags
UE - Gameplay - Blueprint - Jun 22, 2016Editor crashes while attempting to open several marketplace assets. Allar's Generic Shooter Defuse Studios RTS Template JCInventory Frequency: 5/5 Regression (yes) issue (does not) occur in 4.11 ...