Attempting to apply instance changes to blueprint after altering a struct array crashes editor

UE - Gameplay - Blueprint - Dec 14, 2015

Editor crashes if a struct array that has been made editable is edited in an instance within the details pane of the level viewport, then the changes are applied from the instance to the base bluepr ...

Viewport Renders Black when adding a Third Player using Splitscreen Multiplayer

UE - Graphics Features - Feb 24, 2016

As the title suggests, whenever you attempt to add a third player using splitscreen, whenever the third player is created the viewport renders black. This only occurs when the viewport is sized to a ...

Mac Crashing on Editor Launch

UE - Graphics Features - Sep 24, 2015

User reporting he is crashing when launching the Editor "This is a 4.9.1 binary build (latest), I can't give you the exact version because it crashes on the initialisation stage at 0%. The system i ...

Opening Project with MSI Afterburner/Riva Tuner running causes GPU Crashed or D3D Device Removed crash

UE - Rendering Architecture - RHI - Apr 5, 2022

When creating or opening any project from Live UE5 binary, the editor will crash.   Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp] [Line: 859] hr faile ...

Morph Targets Get Overridden By APEX Cloth

UE - Simulation - Physics - Character - Nov 4, 2016

Using a material element with Apex cloth will override the morph targets so that they have no effect. This issue didn't exist in 4.10 and seems to have been introduced in 4.11 due to the many optim ...

Changing BlueprintCallable function's code results in Warning in blueprint that should be considered an Error

UE - Gameplay - Blueprint - May 3, 2016

A user reported an issue where, if a BlueprintCallable function's parameters are edited, a blueprint using a BlueprintCallable function will give warnings instead of an error for a problem after the ...

Cannot resize comment box when new comment is created on top

UE - Rendering Architecture - Materials - Apr 27, 2017

Cannot resize comment box when a new comment is created on top. The resizing affects the bottom right corner. This issue is dependent on how the comment is added if comment 1 is highlighted and a ne ...

Slow while replacing actor in large open world

UE - DEET - EditorPerformance - Nov 8, 2022

Licensee: "Content creators from my team have reported that when they replace actors in an open world it can take more than 10 seconds. This is with several thousand actors loaded in the world. On m ...

Video Capture Renders Black W/Metal

UE - Platform - Apple - Apr 6, 2016

From AnswerHub: Under OS X 10.11.4 using Metal on an AMD FirePro D700, captured video using the editor's built-in video capture tools is black. It doesn't matter if I attempt to capture images or v ...

Get mouse X/ Get mouse Y returns zero after the user clicks the screen and mouse is shown

Tools - Mar 28, 2016

If the user has set show mouse set to true and clicks the screen the Get mouse x and Get mouse Y will no longer return anything other than 0.0 Additional notes: This does not appear to be a regress ...