AActor::CheckActorComponents has misleading warning

UE - Gameplay - Components - Apr 24, 2023

There's actually two issues going on here: 1. The REINST references are incorrect, and due to [Link Removed]. 2. Blueprint created components will always have different names between the instance ...

[MetaSounds][Builder API] - Editor crashes when setting node position to a large value

UE - Audio - MetaSounds - Aug 9, 2023

Setting the location of a node a the MetaSound Editor Subsystem to a very large value crashes the editor.Unhandled Exception: EXCEPTION_STACK_OVERFLOW Crash reporter link: [Link Removed] ...

Outline artefact on cascade shadow transition

UE - Graphics Features - Mar 28, 2024

Some pixels at the edge between cascaded shadow maps and distance field shadows can be skipped by both, leading to unshadowed pixels. Licensee reports the bug happening in 5.3 as well. Test project ...

Nanite TwoSidedSign is backwards

UE - Graphics Features - Nanite - Apr 10, 2025

The value of MaterialExpressionTwoSidedSign is flipped when calculating the Opacity Mask for Nanite meshes. This seems to be a regression in 5.5. ...

Editor crash when deleting a outline folder with subfolders and using context menu

UE - Editor - Workflow Systems - Oct 3, 2023

A user has reported that when using the Scene Outliner in a large map that has many actors and nested folders in the Outliner, deleting a folder that has subfolders from the Scene Outliner with Dele ...

Crash when applying force on event tick to DM

UE - Simulation - Physics - Destruction - Jun 19, 2015

When using a DM and applying force via blueprints with event tick will cause a crash. Workaround: Using a timer instead will not cause any crash even with very low values. Crashreporter: [Link Re ...

Replication default setting of child blueprint resets if parent is compiled

UE - Gameplay - Blueprint - Jul 20, 2015

The setting for Replication on a Blueprint variable resets to None of the Blueprint's parent BP is compiled. ...

Changing UPROPERTY() settings causes detail components to vanish in editor

Tools - Mar 11, 2015

When a UPROPERTY() macro is changed and the recompiled, the hot reload in the editor will cause any BP based on the class to lose certain aspects of the Detail panel such as the actor's transform. ...

Interface cannot be re-implemented after removal from blueprint

UE - Gameplay - Blueprint - Sep 1, 2015

If an interface is removed from a blueprint and an interface function is transferred to a local function, the interface cannot be re-implemented in the blueprint. ...

nonstandard bsp additive brushes cause breaking/artifacting on other bsp brushes when colliding

UE - LD & Modeling - Modeling Tools - BSP - May 14, 2015

if a nonstandard additive bsp brush collides with a standard additive bsp brush, the surfaces of the bsps break and artifact, causing numerous holes in the brushes. ...