Passing a delegate as part of the parameter list for a second delegate causes UHT to crash on compile.

UE - Foundation - Core - Mar 22, 2016

When declaring a delegate that takes another delegate as the variable type for one of its parameters, UHT will crash when attempting to compile the code. ...

Selecting Public/Private when created a class forces any classes added after to either be Public/Private as well

Tools - Mar 22, 2016

In the New C++ Class window when naming the project, if Public or Private are selected (next to runtime) all classes created after that point will assume Public/Private with no option to have neithe ...

Crash on checking event track key property after setting static mesh reference element

UE - Anim - Sequencer - Oct 19, 2017

Event track key with a structure containing staticmesh reference. Setting the staticmesh then reopening the property crashed the editor. ...

int64 UProperty with ExposeOnSpawn meta tag won't compile.

UE - Foundation - Cpp Tools - UnrealHeaderTool - Mar 25, 2020

int64 UProperty with ExposeOnSpawn meta tag won't compile from a C++ UUserWidget class. ...

STAT_VolumetricLightmapBuildData is not counted correctly

UE - Rendering - Features - Dec 9, 2022

STAT_VolumetricLightmapBuildData isn't counted correctly. It seems that the root cause is Volume.IndirectionTexture.DataSize is set to 0 before STAT_VolumetricLightmapBuildData is decreased.// Prec ...

Issue with r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat

UE - Rendering - Features - Mar 30, 2026

When "r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat=1", some values for the Sky Atmosphere at some directional light angles can lead to the sun disk being cut off, and taking on a chord shape. A ...

New Third Party Plugin does not compile on Mac and Linux and prevents project from opening

UE - Foundation - Cpp Tools - UnrealBuildTool - Mar 29, 2016

When the plugin wizard is used to create a new third party plugin and restart the editor as prompted, there is a prompt to rebuild the plugin/project. On Windows this rebuild happens successfully a ...

iOS/tvOS false positive on Shipping config warning

UE - Platform - Mobile - Nov 16, 2018

This warning appears even when building for Shipping config. It did not occur when packaging for Android. ...

Conditional crash when a DragAndDrop operation is done betweeen Data Layers.

UE - Engine Scaling - Streaming - Data Layers - May 8, 2024

A crash occurs to the engine as when we when have unreal as a backgroud task, and we try to drag and drop a layer to another by selecting the layer visibility button. ...