Crash Occurs When Actors are Attached Across Persistent and Sublevels When Levels are Saved

UE - Anim - Sequencer - Dec 12, 2017

Can attach actors to each other through the use of sequencer even though actors are in different levels which leads to crashing when saving and changing levels F3DAttachTrackEditor::IsActorPickabl ...

Using the Set Position in Viewport changes anchor values to 0

UE - Editor - UI Systems - Dec 15, 2017

When Using the "Set Position in Viewport" it changes anchor values of a widget to 0. This node seems like this should not be changing the anchor values, but it is unsure if this is intended behavior ...

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.  ...

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 ...

Replace references doesn't prompt to save dirtied assets that hold a soft reference to the deleted asset

UE - Gameplay - Dec 21, 2017

When deleting an asset any other asset that holds a soft reference to the deleted item will appear in the reference list. For a soft reference when choosing to replace the references with another as ...

Blueprint Nativization Build Error Caused by Child Actor Component

UE - Gameplay - Blueprint - Jan 4, 2018

A licensee upgraded their project to 4.18 and started to receive a compiler error when trying to build a project. This was tested in both their upgraded project and a fresh 4.18 project and the resu ...

When using StringToBytes() it returns an incorrect value

UE - Foundation - Core - Jan 4, 2018

When using the StringToBytes() function it returns one less byte due to the -1 at the end of the return. The function takes a string and converts it to bytes but it always returns one less byte than ...

Flickering with foliage occurs when setting the world origin point

UE - World Creation - Worldbuilding Tools - Foliage - Dec 28, 2017

There is an issue with flickering with foliage that occurs when setting the world origin point. This issue does not appear to be a regression. Versions Tested: Issue occurs in all versions tested 4 ...

Oculus CheckIfPointWithinPlayArea function returns incorrect results

UE - Platform - XR - Jan 10, 2018

Oculus CheckIfPointWithinPlayArea function returns incorrect results, always reporting true whether or not the hand is inside the play area or not.  The distance and closest point also seem incorrec ...

4.14 fails to launch on macOS High Sierra

UE - Platform - Apple - Jan 15, 2018

The engine will crash in `FMacPlatformSplash::Show()` when trying to launch on macOS High Sierra. ...