GPUCrash - exiting due to D3D device being lost. (Error: 0x887A0006 - 'HUNG')

Rendering - Oct 26, 2017

This Jira is for the continuation of the "D3D HUNG" crashes which originally spiked in the UE 4.14 release. Some fixes were implemented in 4.16.2 and 4.17.0 which made some improvement to the frequ ...

Extreme hitching when using profile command (stat startfile) + other stat commands

Core - Apr 19, 2018

Running the "stat startfile" command in a 4.19 project causes constant editor hitching. Running the same command in a 4.18 project does not produce any hitching by comparison. ...

Renaming or Moving a Map with a Landscape in it results in an error and fails to save map

Tools - Landscape - Jul 25, 2018

When renaming or moving a map with a landscape in it this will fail and an error prompt will appear. ...

Ensure fires during nativized build while packaging for any BP class based on UAnimNotify

Anim - Oct 25, 2018

Cooking will fail while attempting to convert a non-data-only Blueprint class based on the native UAnimNotify class when Blueprint nativization is enabled. Workaround in lieu of a fix would be to e ...

Niagara Particles Invisible/Render in Left Eye with Instanced Stereo Rendering enabled

Tools - Niagara - Jul 13, 2018

With Instanced Stereo enabled, CPU Niagara particles are not visible, GPU Niagara particles render in left eye only. ...

GameplayTask classes that have a BeginSpawningActor function never call the Activate function

Gameplay - AI - Oct 3, 2018

A class that inherits from GameplayTask which also has a BeginSpawningActor function will not have its Activate function fired properly. Removing this function causes it to fire properly. Regressio ...

[CrashReport] UE4Editor_D3D11RHI!FD3D11DynamicRHI::RHICreateUniformBuffer() [d3d11uniformbuffer.cpp:218]

Rendering - Jun 12, 2018

No user comments in crash group 208 check(Layout.ResourceOffsets.Num() == NumResources); 209 210 for (int32 i = 0; i < NumResources; ++i) 211 { 212 ...

Importing a Landscape Layer with World Composition Enabled is Taking All Available Memory

Tools - Landscape - Sep 18, 2018

When importing layer information to a landscape the engine will freeze and consume all available memory. Unable to test in 4.19 due to provided project being made in 4.20. I have attached a log from ...

Morph Target Sets to Zero When Transitioning From 1 to -1 Causing Flickering

Anim - Jan 16, 2018

-Morph target cycles through all values instead of only alternating between 1 and -1 -Couldn't reproduce in 4.17 -attached a test morph target asset Link to example video from user: [Link Removed] ...

Meshes simulating physics cannot roll smoothly across multiple connected meshes

Physics - Jul 30, 2018

A user has reported a physics regression from 4.19 to 4.20 where attempting to roll a static mesh down a slope made of multiple meshes no longer results in a smooth roll. The static mesh will skip a ...