Unreal Engine Issues

Blueprint derived from C++ class not saving correctly

The blueprint that the user is using loses some data when the editor closes and reopens despite saving all of the content. Note: Currently unsure of what exactly causes this but as I am able to rep ...

Deleting a project also deletes content of folders referenced by a Windows symbolic link

Deleting a project from the Epic Games Launcher will also delete any files that are located in external folders that the project includes via symbolic link. In this case the only thing that should b ...

Morph target is not applied on the first frame in Level Sequence

When a skeletal mesh with morph targets spawns in the sequence, the morph is not reflected in the first frame.  In the ProcessStage_SkinCache call of SkeletalMesh, MorphVertexBuffer->SectionIds is ...

Hierarchical LODs used with Precomputed Visibility cause actors to occlude that should not behind translucent materials

When using Precomputed Visibility in conjunction with HLODs and translucent materials without them culling actors occluded by the translucent material. The example gif attached shows that the base ...

Children of editor-only actors do not maintain correct transforms when placed inside level instances for PIE and cooked builds

We have found an issue where children of editor-only actors get wrong transforms in PIE and cooked builds when placed inside level instances. This affects both engine version 5.5 and 5.6. The issue ...

Dynamically binding 'OnComponent' functions in code doesn't trigger bound functions

Binding a function in code to OnComponentBeginOverlap, OnComponentEndOverlap, or OnComponentHit does not trigger the bound function from code. ...

Internal Compiler error when calling a custom enum in a struct from a blueprint macro

If a macro is referencing a custom enum within a struct and compiled after another output pin is removed, an internal compiler error will appear and the blueprint will not compile. ...

On Hit Events are inconsistent/inaccurate when using Substepping most notably at lower frames per a second

This is a regression Tested in: //UE4/Release-4.27 CL18319896 Binary //UE5/Release-5.0-EarlyAccess CL16682836 Binary Under the same conditions in UE4 the On Hit events fire accurately and as expect ...

Foliage rendering issues when using both Density Scaling and MaxWorldPositionOffsetDisplacement

When a material with WPO effects and MaxWorldPositionOffsetDisplacement is applied to a foliage mesh, foliage applied to a map will no longer work as expected with density scaling, especially after ...

Masked Mesh has significant performance hit on some android devices