Quickly using alt-tab with a blueprint in a new window causes the event graph to capture input of the alt key

Tools - Nov 13, 2017

Quickly using alt-tab with a blueprint in a new window causes the event graph to capture input of the alt key. This issue does not occur when the blueprint is a tab of the main UE4 editor window. Th ...

Audio/Video out of sync after seek

Media Framework - Jan 29, 2018

There is an issue that sometimes occurs when using the seek option in the media player while the Decoder is set to WMF. When this happens the audio desyncs from the video and for the rest of the vid ...

Geometry Pen Tool Duplicates Bushes On Grid Size 1 & 5

UE - LD & Modeling - Modeling Tools - BSP - Mar 7, 2018

There is an issue occurring when creating brushes with the pen tool at grid size 5 where verticles or the brush shape itself seems to be doubled. This issue also occurs if the grid size is 1, though ...

Mouse Events cannot be treated as Touch on Android Apps on Chromebook

UE - Platform - Mobile - Mar 18, 2019

A licensee reported an issue where mouse events are not able to be used as touch events on Android apps. This was specifically reported on and tested on Chromebooks. After working with Chris Babcock ...

Deprecated components can still be added via the Add Component button

UE - Gameplay - Blueprint Editor - Oct 19, 2021

The UDN has a possible fix for this issue in the Component Type Registry You can use the following as a test C++ class: #pragma once #include "CoreMinimal.h" #include "Components/ActorComp ...

UInstancedStaticMeshComponentRemoveInstances crashes if called with an empty array

This looks like it can be fixed with an early-out when the passed array of indices is empty. Log:[2024.01.03-16.38.36:091][291]LogOutputDevice: Warning: Script Stack (1 frames) : /Game/BP_Crashy.B ...

Calling GetMaterial during compile on load can cause the material shader to fail to compile

UE - Rendering Architecture - Materials - Oct 4, 2024

Calling UStaticMeshComponent::GetMaterial() during a Blueprint compile on load can cause the Material shader to fail to compile because GetMaterial will trigger a PostLoad call on that Material and ...

Simple HUD in Topdown template will have rendering errors if played in Immersive mode

Tools - Feb 27, 2015

Simple HUD in Topdown template will have rendering errors if played in Immersive mode (F11). It will cause a white flickering line on the left and top of the window that will start to blur as the p ...

Adding assets to a project on a drive that is full still creates the file at the desired location instead of in a temporary location and provides no information as to why the asset is failing to load, corrupting the asset

Tools - Oct 31, 2016

Adding assets to a project on a drive that is full still creates the file at the desired location instead of in a temporary location and provides no information as to why the asset is failing to loa ...

Orthographic Camera Preview window does not render materials

UE - Graphics Features - Jan 17, 2015

I am using the orthographic camera preview fairly extensively for making an in-engine Tiling Texture maker. This feature is currently busted since the orthographic camera preview window is rendering ...