Crash in PCGComponent during file load for file with vegetation from placement tools

TM - Rendering - Jul 14, 2025

Reported in SF [Link Removed] Client has a file that consistently crashes during loading in the PCGComponent.cpp that appears to be linked to placed vegetation. Crash occurs during file open and m ...

Drag-and-drop any cooked Blueprint class asset into the level viewport crashes the editor

UE - Framework - Blueprint - Jul 14, 2025

Dragging any cooked Actor-based Blueprint class asset into the level editor viewport will crash the editor when it has been configured to work with cooked assets. This is a regression that started ...

Interchange framework is bypassed on the second attempt after a failed import

UE - Editor - Content Pipeline - Import and Export - Jul 14, 2025

Hello! We have encountered a bug with the Interchange pipeline. When an interchange texture import is cancelled due to non-power of 2, and then the same texture is imported again without any change ...

When moving actors to the current level, their label is reset and displayed incorrectly on the Scene Outliner until the next time it is refreshed

UE - Editor - Workflow Systems - Jul 14, 2025

This is a regression, it worked correctly up to UE 5.4, but repros on UE 5.5 and 5.6. Also, this seems related to [Link Removed], which was fixed by CL 40649716/40649749 and integrated into UE 5.6, ...

Console command “showflag.rendering 0” causes crash

UE - Rendering Architecture - Jul 10, 2025

A crash occurs when the console command “showflag.rendering 0” is executed. This does not occur in UE5.5, so it is a iassue in UE5.6. ...

Bindless Textures in active use are able to be garbage collected

UE - Rendering Architecture - RHI - Jul 9, 2025

It is possible for textures referenced in the bindless texture data assets that are actively used in materials being rendered in the active viewport to be garbage collected. This results in the mat ...

Editor crash when adding mesh renderer elements in Niagara

UE - Niagara - Jul 8, 2025

When adding multiple meshes to a Niagara Mesh Renderer Module, a check() will be triggered due to a mismatch in the number of Widgets and the number of Tooltip Widgets. ...

Channel Mask Parameter does not correctly pull through the Alpha channel from

UE - Rendering Architecture - Materials - Jul 8, 2025

The ChannelMaskParameter node in the Material Graph works in most cases, but unusually does not work when extracting the value of the Alpha channel only for Vertex Color input data. ...

Saving Behavior Tree with Blueprint task inheriting from native class invalidates Blackboard key when BP contains a function

UE - AI - Jul 8, 2025

A regression introduced in UE 5.6 causes Blackboard key selectors in Blueprint tasks to become invalid when the Blueprint inherits from a native subclass of UBTTask_MoveTo (or UBTTask_BlackboardBase ...

Assigning a static mesh to a Mutable Clip Mesh With Mesh Node can crash the editor

UE - Anim - Mutable - Jul 4, 2025

Context: The Mutable plugin has a modifier node called Clip Mesh With Mesh that allows Static Mesh modifiers to be assigned as the clip mesh. Under certain circumstances, an assert can be triggered ...