Cannot Include VoiceInterface.h Without First Including OnlineSubsystem.h

UE - Networking - Nov 30, 2016

Including VoiceInterface.h causes compiling to fail until you include OnlineSubsystem.h in the same file. This is not expected because VoiceInterface.h is part of the OnlineSubsystem module which ...

virtual texture lightmap crash due to pixel format r8Unorm_srgb in MacEditor

UE - Rendering - Architecture - RHI - Mar 4, 2021

Currently r8Unorm_srgb is required by virtual texture lightmap, and the Metal RHI simply forbids r8Unorm_srgb on Mac platform. Since the latest MacOS 11.0+ have the support of r8Unorm_srgb, we shoul ...

Game window renders transparent when launched with -game -log commands on Mac

UE - Platform - Apple - Oct 31, 2016

This is only occurring on Mac and only in OSX 10.12. This is also a regression from 4.13 Right clicking in the dock, Show all windows, and selecting the game window does NOT fix the issue. Runnin ...

UNetConnection::NotifyConnectionUpdated always sets MyConnectionId to 1

UE - Networking - Jul 28, 2026

This looks to be due to an oversight in how the conditions are checked in NotifyConnectionUpdated, where the “&&” operator results in MyConnectionId always being set to 0 or 1:if (const uint32 MyCon ...

Hang and log spam when making changes to a landscape material with the landscape editor open

UE - LD & Modeling - Terrain - Landscape - Jul 25, 2016

Editor hangs if changes are made to the material which is currently assigned to a landscape while the landscape editor is open. Also spams "LogMaterial: 0.03 seconds spent updating 1 materials, 1 i ...

Source assumes that TG_PrePhysics is the first tick group

UE - Gameplay - Feb 16, 2016

Licensee has reported an issue with the source code and proposed a fix. The issue is that the source is assuming that TG_PrePhysics is the first tick group in all cases. Information can be found abo ...

Code based interfaces do not appear in Interface selection dropdown

UE - Gameplay - Blueprint - May 4, 2017

When adding an interface to a blueprint, only blueprint created interfaces are available. Engine / custom interfaces written in code are not listed. Regression: Yes - custom interfaces are present ...

[Audio Capture] - Editor crashes when activating an Audio Capture component when there are no active input or output devices avilable

UE - Audio - Aug 12, 2022

If a device has no available input or output devices, activating an Audio Capture component will cause the device to crash. Occurs in Editor and Runtime. Assertion failed: NumTotalFrames > 0 [File:E ...

[CrashReport] Mac crash in FMinimalDummyForwardLightingResources

UE - Graphics Features - Jan 18, 2017

This is a frequent crash occurring in the 4.15 Preview. No other information is currently known. Regression? Yes - there is no evidence of this occurring in 4.14 ...

Copying a socket to another skeleton adds a "_0" suffix

OLD - Anim - Jun 28, 2017

Copying a socket to another skeleton adds a "_0" suffix Occurs on? 4.15 - 3450819 - YES 4.16 - 3466753 - YES 4.17 - CL#3512142 - YES ...