Exiting PIE with dedicated server checked causes editor to crash on Linux

UE - Platform - Linux - Oct 25, 2016

Checking the box for Dedicated Server in the Play dropdown menu causes the editor to crash when exiting PIE. This does not occur in 4.13 or 4.14 on Windows. ...

Unloading level during PIE leads to editor crash

Tools - Dec 6, 2017

Unloading level during PIE seems to lead to an editor crash. Most easily reproducible by enabling malloc stomp. ...

Editor crashes if Sequencer has keyframes for a variable that has changed

UE - Anim - Sequencer - Sep 19, 2018

The Editor crashes if loaded sequence has keyframes for an actor variable that has been changed, instead of soft erroring out. This was reported and tested on 4.20.3 (CL-4369336). It was reproduced ...

Mobile VR App Crash with Monoscopic Far Field and Multi-View enabled

UE - Platform - Mobile - Nov 23, 2018

Mobile VR (Oculus Go) App Crash with Monoscopic Far Field and Multi-View enabled Workaround: Do not use Monoscopic Far Field and Multi-View at the same time Also confirmed in 4.22 Main @ CL 45 ...

Changing Texture compression settings breaks Materials with mismatch on Texture Sample Sampler Type

UE - Rendering - Architecture - Materials - Aug 5, 2015

If you change a texture's compression settings, materials will show errors because of a mismatch in the Sampler Type of Texture Samples. This can be fixed by adjusting the Sampler Type and re-savin ...

Switching to different modes in the Modes panel causes PIE to take input from a connected VR headset for the Y axis camera movement

UE - Platform - XR - Dec 9, 2016

If a VR headset is connected, it will be used for Y axis camera input in PIE if you have switched to and from the Landscape tab in the Modes panel. You can fix this temporarily by reopening the edit ...

[CrashReport] Mac crash in UE4Editor-Engine.dylib!LoadPhysXModules()::$_0::operator()()

UE - Platform - Apple - Jun 8, 2017

This is a common Mac crash that has been occurring since 4.15. It shares the same callstack with [Link Removed], but that was verified fixed for 4.16.0, while this crash still continues into 4.16. ...

On mouse Down not firing for left click on Button widgets when using precise click

UE - Editor - UI Systems - Aug 31, 2017

When using the left mouse button to click and drag a button, the on drag detected will not fire even when using precise click. This was not the case in previous versions of the engine (Works as expe ...

Can't change to Orthographic View when viewing Character assets in Editor

OLD - Anim - Nov 20, 2017

When attempting to view an Animation Blueprint, Skeletal Mesh, or Physics Asset in any of the Orthographic views the Editor remains in Perspective View. This is a regression as the issue was not pre ...

Mouse movements during Simulate will slightly move Skeletal Mesh actors that are simulating physics

UE - Simulation - Physics - Nov 27, 2017

Mouse movements during Simulate will slightly move Skeletal Mesh actors that are simulating physics. This also effects physics assets in the PhAT editor during simulate. The effect is small but I wa ...