Actor components added natively can be set to null on derived blueprints during blueprint compilation

UE - Gameplay - Blueprint Compiler - May 7, 2021

A native default subobject can be nulled out during compilation of the owning class in derived Blueprints with circular dependencies.  ...

Improve BSP Face Selection Behavior

UE - LD & Modeling - Modeling Tools - BSP - May 4, 2021

Modifying BSP brushes from their original shape sometimes makes it hard to select certain some faces; clicking on various points on the face, modifying the camera or toggling translucent selection a ...

IOS Preview on MacOS crashed when open postprocess material that uses stencil

UE - Platform - Mobile - May 3, 2021

IOS Preview on MacOS crashed when open postprocess material that uses stencil ...

Editor freezes when force deleting a level created with Conversion Suffix

UE - World Creation - Worldbuilding Tools - World Partition - Apr 20, 2021

Once force delete is initiated, editor was still non-responsive ~10 minutes later and had to be closed from Task Manager. Upon reopening the project, the level is still present in Content Browser an ...

Nvidia Graphics Drivers cause editor menus to flicker and disappear after using the editor for an extended period of time

UE - Graphics Features - Apr 16, 2021

This issue seems to be occurring on a variety of Nvidia cards. So far, I haven't seen any indication that it is affecting AMD graphics cards. The majority of the reports have indicating that the pro ...

Validation error in FSkeletalMeshSceneProxy::GetDynamicRayTracingInstances due to wrong LODSection.SectionElements count

UE - Graphics Features - Lumen - Apr 16, 2021

The following condition is sometimes not met: LODSection.SectionElements.Num() == MeshObject->GetRayTracingGeometry()->Initializer.Segments.Num() ...

Retainer box widget causes progress bars to render incorrectly

UE - Editor - UI Systems - Slate - Apr 14, 2021

Retainer boxes are currently causing progress bars to render incorrectly. This looks to be related to [Link Removed] which is fallout from the changes to retainer widget transform calculation introd ...

Vcam - Objects Jittering with Vcam's Follow Cam modifier

UE - Virtual Production - Tools - Virtual Camera - Apr 8, 2021

Non instanced subobject gets set to none after compiling editor

UE - Gameplay - Components - Apr 2, 2021

Non Instanced Subobject sets to none after compiling the blueprint. Please see attached video for more details. Checking regression in 4.26 now ...