Unreal Engine Issues

Attempting to Open a Widget Blueprint With Animation and Timeline Panels Hidden Causes the Editor to Crash

When you attempt to open a widget blueprint when you have hidden the animation and timeline panels, the editor will crash. There is a workaround: Window->Reset Layout will allow you to open the blu ...

UMG SetAnimationCurrentTime no longer works

lots of wasted Volumetric lightmap samples

Expectations: The samples should only surround the lightmass importance volumes.  Imagine if we build a 8K*8K map with lightmap importance volume at the corners of the map, even using stream levels ...

Switching to SM4 with LPVs active crashes Editor

Switching to SM4 when you have LPVs active in a project will crash a project. Also reproduced in Main Promotable-CL-2589716 and 4.8.0 Launcher [Link Removed] ...

Import options broken when importing bones-only fbx animation

This bug is being entered for integration purposes. This is already fixed in 4.9 Main with one of Lina's changes (CL:2584657). Wanted to try and get this into a 4.8 hotfix ...

The == node is no longer available for Strings

The == node is no longer available for Strings. Reproduced in 4.8.0 and Main (The == node is no longer available for Strings). This is a regression: the == node for strings existed in 4.7.6 ...

When playing matinee, scrubbing can cause sound to keep playing when it isn't triggered

When playing matinee, scrubbing can cause sound to keep playing when it isn't triggered Note: This was entered as a bug to re-work the fix from the pull request found here: [Link Removed] ...

Creating a plugin marks the plugin enabled without loading it

The editor is required to restart for the Editor Toolbar Button plugin to appear. The plugin is enabled and the project is compiled, but the button does not appear. After further discussions, we a ...

Niagara system loses source emitters when moving Engine from 4.22 or earlier to 4.23 or later.

The following code causes this behavior.// NiagaraSystem.cpp for (FNiagaraEmitterHandle& EmitterHandle : EmitterHandles) { EmitterHandle.ConditionalPostLoad(NiagaraVer); if (!EmitterHandl ...

Assertion thrown when selecting the Input Preview arrow within a collapsed node within the Material Graph

This is a regression testing in //UE4/Release-5.0 CL#18319896 Assertion thrown when selecting the Input Preview arrow within a collapsed node within the Material Graph. ...