Crash on Event Begin Play with UMG Widget and 2 or More Players

UE - Editor - UI Systems - Feb 25, 2015

A player with UMG widget created on BeginPlay works fine when hitting play with only 1 player, but if you set the number of player > 1 it will crash. User believes this is somewhere related with t ...

Adding a node or variable to a component referenced by another actor crashes editor

UE - Gameplay - Blueprint - Aug 3, 2015

If compile is pressed after adding a variable or node to a blueprint component that has a variable referenced within another blueprint actor, the editor immediately crashes. Frequency: 1/1 Crashr ...

Gameplay Tags Can't Be Edited Via "Bulk Edit via Property Matrix"

Tools - Dec 25, 2019

You can't edit a gameplay tag when you bulk edit via the property matrix. Found in 4.23.1 CL#10757647 Reproduced in 4.24.1 CL# 107567474.25 Main CL#10868506 ...

[CrashReport] UE4Editor-CoreUObject!UObject::SetLinker(FLinkerLoad *,int,bool) [UObjectLinker.cpp:107]

UE - Foundation - Core - May 13, 2019

Comment from user in crash group:I updated unreal engine to 4.22.1 and changed the project version from 4.21.2 to 4.22.1 and now it crash whenever i open a map Generated from CrashReporter ...

Decals Normal only + Material Attributes

UE - Graphics Features - Mar 24, 2023

This does not just work with BaseColor, you can affect any of the outputs by connecting something to a disconnected CreateMaterialAttributes. ...

Unwanted black boundaries are displayed in a vertical split-screen with 3 players.

UE - Gameplay - Dec 2, 2019

Floating point error from UGameViewportClient::SplitscreenInfo causes this issue. FMath::TruncToInt( 3240 /*ViewportSize*/ * 0.333f/*Ratio in SplitScreenInfo*/ ) = 1079 I suggested a following t ...

HTML5 fails to compile on Mac/Windows - Shipping

UE - Platform - Apple - Jan 13, 2017

HTML5 fails to compile on Mac when built for shipping in binary I did not see this when packaging for development yesterday Does not occur in 4.14.3 The error appears to be WebGL relatedError: Web ...

iOS movie (mp4) has no sound in the playback.

UE - Platform - Mobile - May 16, 2017

There is no sound in the movie play in iOS, built with 4.16 GitHub source code version. you can simply reproduce using attached sample project. This is reproduced in iPhone 5s(10.3.1) iPhone 6(iOS ...

Crash during Datasmith file import when not using Keep Hierarchy

TM - Interoperability - Jun 24, 2025

Reported to support. The user has reported that one of their .udatasmith files will consistently crash in TM 2025.1.1 during import. This was consistently reproducible when importing using Collaps ...

Animated characters may appear in A pose after loading a file with Path Tracer enabled

TM - Rendering - Mar 12, 2025

When saving a file with Path Tracer enabled at the time of save, animated characters will appear in an A pose state. This will persist until Path Tracer is disabled. Occurs in Twinmotion 2024.1.2 a ...