Undoing the pasting of a copied node from the Blueprint Diff tools causes an access violation crash

UE - Gameplay - Blueprint Editor - Aug 24, 2017

The editor crashes with an Access Violation if a node that was copied and pasted from the Blueprint Diff tools is removed via an undo. Regression?: No This issue also occurred in 4.16 Branches tes ...

Editor stalls on Mac after key up, mouse up

UE - Platform - Apple - Dec 19, 2019

UDN user reported a performance hit on Mac with the latest Hotfix release when the user is interacting with the editor either through keyboard or mouse input. This performance hit is noticeable whe ...

Geometry Collection Actors do not respond with the appropriate Actor nor Component for OnComponentHit events

UE - Simulation - Physics - Solver - Apr 22, 2022

Geometry Collection Actors do not respond with the appropriate Actor nor Component for OnComponentHit events. Upon placing a breakpoint after following the steps to reproduce, you can see that the O ...

LiDAR plugin crashing with VR Instanced Stereo enabled

UE - Platform - XR - Jan 26, 2023

When enabling LiDAR plugin with VR Instanced Stereo enabled it causes a crash. Alternate repro: From Any project Enable Instanced Stereo in project settings Enable LiDAR Point Cloud Support Restar ...

Widget Blueprint breakpoints hit during a Tick event do not engage the debugger.

UE - Editor - UI Systems - Jun 13, 2024

The user comment on the Salesforce issue " This is a regression from the behaviour in 5.3.X, and I've reproduced it in 5.4.0, 5.4.1, and 5.4.2. The specific issue/change that caused this regression ...

Wobbling effect on meshes

UE - Graphics Features - May 31, 2022

Weird wobbling rendering artifact are generated on the surface of the Mesh located far from the origin.  ...

Crash occurs when compiling in Editor after editing a C++ file

UE - Foundation - Cpp Tools - Hot Reload - Jan 5, 2021

Crash seems inconsistent, doesn't seem to happen every time. You may have to change the variables and re-compile through the editor a few times to get it to trigger. The crash did occur for me when ...

Editor Crashes When Attempting to Open Material Function

UE - Rendering - Architecture - Materials - Jun 2, 2017

The editor is crashing when trying to open a material function that the user provided. User Quote: One of my material functions crashes the engine when I open the editor for it. It works fine, I ...

Loading a blueprint that uses the GetOptions meta data causes an ensure

UE - Gameplay - May 6, 2020

Loading a blueprint that uses the GetOptions meta data causes an ensure ...

Crash when reimporting SkeletalMesh with custom LOD

UE - Editor - Content Pipeline - Import and Export - Oct 29, 2021

In the case of "Reimport Base Mesh + LODs", there is no crash. ...