Unreal Engine Issues
Unreal Engine Issues
Widget Flickering Observed in RetainerBox with Incorrect LayerId
UE - Editor - UI Systems - UMG - Nov 19, 2024Setting the Phase Count of a RetainerBox to 2 or more may cause other widgets within the same UserWidget to flicker. Upon investigation, we found that during frames where the flickering occurs, the ...
Unwanted offset on curves when importing animation assets
UE - Editor - Content Pipeline - FBX - Jun 27, 2025Hello, We seem to have encountered some unwanted behaviour when importing certain curves from our animation fbx assets into Unreal. Some of these curves don't have keys from the very first frame, b ...
Lumen generates gradated shading even if the light is a constant color sky light
UE - Graphics Features - Lumen - Jul 22, 2022Lumen generates a gradated shading even if objects are lit by a 360-degree constant sky light.[Link Removed][Link Removed] I looked into this and found that this comes from Spherical Harmonics int ...
ContentBundleContainer does not load new bundles in PIE after level transition
UE - World Creation - Worldbuilding Tools - Nov 9, 2023I believe this issue stems from the ContentBundleContainer not populating the StreamingObjects of the UContentBundleDuplicateForPIEHelper. PIE in the same level as the bundles works as the editor h ...
GPULightmass baking issues on AMD
UE - Graphics Features - Jul 28, 2025Volumetric Light Maps are not generated correctly when baked with GPU Lightmass on AMD GPUs. The issue has been reproduced on RX 9070, RX 9070 XT, and RX 7900 XT. ...
Landscape visualizers don't work on nanite landscape
UE - Graphics Tools - Terrain - Nov 24, 2025Landscape visualizers do not work on Nanite Landscapes. Also tested in //UE5/Main/, CL: 48569009 The licensee has provided a patch file with a potential fix. ...
HZB occlusion is broken on Instanced Stereo
UE - Platform - XR - Oct 2, 2025Other engine features requiring HZB data (such as per-instance GPU LOD selection occlusion culling or light grid culling) are also impacted regardless of whether r.HZBOcclusion is enabled. ...
The == and != symbols of the 'Not Equal(Enum)' and 'Equal(Enum)' are obscured
UE - Framework - Blueprint Editor - Nov 7, 2022This is not a regression this has existed since as early as 2015(seen screenshot: [Link Removed]). Tested in //UE4/Release-4.27 CL18319896, and //UE5/Release-5.0 CL20979098 As user reported the == ...
Changing default values in a user defined struct will break links
Changing user defined struct values appears to break any nodes that use pin splitting for the given struct. It would appear that some parent pins aren't set correctly during reconstruction, which or ...
In editor, custom primitive data dont work on instance static meshes in bp instance
UE - Framework - Components - Jun 25, 2024Changes to custom primitive data properties for instanced meshes placed in the editor work in-game but are not otherwise reflected in-editor. ...