Unreal Engine Issues
Unreal Engine Issues
CreatePatchLibrary is broken
UE - Rendering Architecture - Shaders - Nov 12, 2025It seems the FEditorShaderCodeArchive.LoadExistingShaderCodeLibrary missed some functions, use FEditorShaderCodeArchive.AddShaderCodeLibraryFromDirectory instead could fix the issue. ...
Behavior tree assets marked dirty when opening in subeditor
UE - AI - Aug 16, 2016Found while I was fixing up other content, that Behavior Tree assets are being marked dirty by just opening them into sub editor. ...
SSR not rendering correctly in SM4 Preview
UE - Graphics Features - Sep 20, 2017This is a regression from 4.17.2 and you do not need to be in PIE to see the effect. This is not seen in Shader Model 5 ...
Moving or renaming a file in the editor should execute a Perforce move command not a delete+add
Tools - Aug 31, 2016Moving or renaming a file in the editor erases its perforce history. It should execute a move not a delete + add to fix this ...
IOS-Shipping memory managentment failed for std::string
UE - Platform - Mobile - Oct 8, 2018[Image Removed] [Image Removed] [Image Removed] if strip with -x option, it will fix this issue. ...
InstancedStaticMeshes disappear in Shipping builds on mobile when affected by dynamic point lights
UE - Platform - Mobile - Aug 22, 2019This ticket is to add the safe workaround for 4.23.1, with a more optimal fix coming in 4.24. ...
Movement broken for Top Down template for Clients
Docs - Samples - Jan 7, 2015There is no way to control the player after creating a new top down project (blueprint or code). This should be fixed by [Link Removed] ...
Creating BlueprintActor from EmptyActor produces an Actor with multiple DefaultSceneRoots
UE - Gameplay - Blueprint - Jan 24, 2020This does not happen with UE4.22. Maybe related to CL#7462096 and CL#7476283. These are fixes for [Link Removed]. ...
UserDefinedEnum variables in UserDefinedStructs aren't properly updated when the enumerations are reordered.
UE - Gameplay - Feb 4, 2020UserDefinedEnum variables in UserDefinedStructs aren't properly updated when the enumerations are reordered. FEnumEditorUtils::BroadcastChanges fixes up Blueprints but not UserDefinedStructs. ...
TSlateMaterialShaderPSDefault cast error when opening Platform Stats in Lyra's M_UI_Base_BordersAndButtons Material
UE - Rendering Architecture - Materials - Jun 16, 2022Licensee has provided a potential fix, please see the UDN link. Callstack attached utilised -onethread ...