Regression: "Play particle effect" anim notifies are not seen in the editor playing level sequence/matinee when Attached is set to false

UE - Graphics Features - Dec 21, 2017

Not Attached particle system is not seen in the viewport of the editor. This particle will be seen normally when PIE.  Regression? Yes. This issue is not reproduced in 4.17 version. You can simply ...

Stereo layer graphical error after scaling the stereo layer

UE - Platform - XR - Dec 20, 2017

Stereo layer appears offset and scaled incorrectly when scaling a stereo layer.  ...

Clicking on an Actor in the World Outliner jumps to Details tab if it is docked with the World Outliner

Tools - Dec 20, 2017

When clicking on a actor in the World Outliner while the Details tab is docked to it, it switches over to the Details tab. This bug was not present in 4.17.2 but is in 4.18 and 4.19. ...

Override Attenuation Can't be Unchecked When Audio Component Added to Blueprint and Blueprint Attached to Actor

UE - Audio - Dec 20, 2017

Checking Override Attenuation in Details <  Audio Component < Attenuation disables settings that further adjust the Attenuation. Such as: Attenuation Air Absorption, Attenuation Listener Focus, Atte ...

Black screen displayed on iPad when project using ARKit enables the Metal Forward-Desktop Renderer option

UE - Platform - XR - Dec 20, 2017

When the Metal Desktop-Forward Renderer option is enabled for a project using the ARKit, the camera input does not appear to be displayed as the background for the app. The background remains black, ...

Thirdperson Character not Replicating correctly after being attached to an Actor

UE - Networking - Dec 20, 2017

Problem description: When the Third Person Character gets attached to any other Actor (AttachToActor, Rule: Keep World), from the view of other clients the character (capsule, skeletal mesh) is out ...

Detail Panel Favorites cause many settings to be duplicated or shown when they aren't normally

Tools - Dec 20, 2017

Enabling the "Enable Details Panel Favorites" experimental setting causes some details that were not previously shown to appear. In version 4.18 and onward, it also causes these new details to have ...

BuildEditorAndTools build graph script no longer produces working editor executable

UE - Foundation - Horde - BuildGraph - Dec 19, 2017

It looks like the BuildEditorAndTools script is no longer copying the (pre-existing in perforce) files from //UE4/Dev-Core/Engine/Binaries/Win64/ to the output LocalBuilds directory, which means the ...

Actor reference in actor component is cleared after the containing actor is compiled

UE - Gameplay - Blueprint - Dec 19, 2017

A variable with an actor reference that is owned by an actor component will lose it's reference if the actor that it is applied to is compiled.  ...

Unable to bind events to OnPerceptionUpdated in Blueprints

UE - Gameplay - Blueprint - Dec 18, 2017

Attempting to bind an event to OnPerceptionUpdated results in an error in Blueprints. It seems that this is caused by the TArray in the function signature not being a constant reference. Current co ...