Unreal Engine Issues
Unreal Engine Issues
Crash when using StaticDuplicateObject with mismathced Source and Destination class types
UE - Foundation - Jun 19, 2025Starting in Unreal Engine 5.4, StaticDuplicateObject internally switched to using Unversioned Property Serialization (UPS) for performance reasons. However, UPS assumes the source and destination ob ...
Crash Occurs When Creating Pose Asset from an Animation in Persona
OLD - Anim - Feb 1, 2018Engine crashes when creating a new pose asset in persona using the Create Asset option -Tested with walk, idle, and run anims -Didn't crash only once out of the several times tested with the Third ...
Mutable references MetaHumans heads directly, but DNA Assets are private
UE - Anim - Mutable - Sep 18, 2025When we switched our project to 5.6.1 This error appeared on build. The compilation of the Mutable assets in the editor is not reporting any issue. ...
Text block Outline cropped out at large sizes
UE - Editor - UI Systems - Mar 8, 2017Text block Outline cropped out at large sizes. This affects Grid Panels and was additionally tested with Horizontal boxes with the same result Regression: This issue does not occur in 4.14.3 Binary ...
Per-section shadow/collision flags lost when merging actors
OLD - Anim - Mar 24, 2017Information loss when merging actors such as cast shadow and collision. If one of the actors being merged has a different setting such as not casting shadows. This information will be lost and repla ...
ShaderCacheTool build fails
UE - Graphics Features - Oct 25, 2017In 4.18 and 4.19, it is no longer possible to build the ShaderCacheTool. REGRESSION: Yes. The ShaderCacheTool builds successfully in 4.17.2. It looks like the missing MergeShaderCacheFiles property ...
CLONE - ShaderCacheTool build fails
UE - Graphics Features - Nov 20, 2017In 4.18 and 4.19, it is no longer possible to build the ShaderCacheTool. REGRESSION: Yes. The ShaderCacheTool builds successfully in 4.17.2. It looks like the missing MergeShaderCacheFiles property ...
High Quality Gaussian DoF on Mobile is broken
UE - Platform - Mobile - Apr 11, 2018UDN issue: 4.19 High Quality Gaussian DoF on Mobile效果出错？ Another answer hub report: https://answers.unrealengine.com/questions/757162/dof-bug-on-mobile-with-419p4.html ...
Editor grid zfighting with meshes
UE - Graphics Features - Jun 15, 2018The editors snap grid will zfight with flat surfaces of static meshes and BSPs. Found in 4.19 CL# 4033788, 4.20 preview CL# 4121666, 4.21 CL# 4131780 ...
Web Browser: No Transparency in 3D Widget Component on Mobile
UE - Platform - Mobile - Jul 6, 2018Transparency is not being applied to web browser inside of 3d widget on android. Tested with Samsung Galaxy S5 4.19.2 CL 4033788 4.20p5 4173640 4.21 CL 4179794 ...