Cannot uncheck "Support armv7" setting in the project settings without first enabling "Support armv64"

UE - Platform - Mobile - Jan 4, 2018

The editor silently ignores in put from the user when trying to uncheck the setting "Support armv7" (when this setting is the only one checked between the options of support armv7 and support armv64 ...

Naming CustomEvent string Input "DisplayName" breaks Blueprint Node

UE - Gameplay - Blueprint Editor - Jan 4, 2018

Naming a custom event string input DisplayName will cause the BP Node spawner to use blank or user-entered data for node listing+creation. Additional Notes: This also occurs when renaming the Text ...

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 ...

Editor becomes unresponsive when Playing Editor with 3 or more players when an Oculus is hooked up

UE - Platform - XR - Jan 4, 2018

The editor appears to freeze when PIE is set to run with 3 or more players and an Oculus is hooked up to the machine. As a note this issue occurs the second time that PIE is used. ...

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 ...

Pick New sprite option becomes unavailable if you change the view options

Tools - Jan 4, 2018

The Pick New sprite option becomes unavailable if you change the view options to either tile or column when working with the keyframes of a 2D animation. This issue affects the project indefinitely ...

Applying Clothing Data Causes Mesh Vertex Color to Turn Black (or crash)

OLD - Anim - Jan 3, 2018

-When a clothing asset is applied to the mesh, the vertex color(s) change to solid black -Can be removed by right click Remove Clothing Data -Crashes in Main-4.20 -Can't be tested in 4.17.2 due t ...

Data loss when FPlane is implicitly converted to FVector4

UE - Foundation - Core - Jan 3, 2018

The FSceneView::Deproject function calls FMatrix::TransformVector4 and passes an FPlane value. TransformVector4 takes in an FVector4 parameter, so the value being passed is implicitly converted to F ...

Translucent Materials and Atmospheric Fog Appear Black or Pink on Mac

UE - Graphics Features - Jan 3, 2018

I tested this on a Mac Pro in UE 4.15, 4.16, 4.17, and 4.18. As a possible workaround for the fog issue, I've discovered that setting Atmospheric Fog > Lighting > Disable Ground Scatter to "True" wi ...

Cannot undo moving a mesh via Pilot

Tools - Jan 2, 2018

There is an issue where the undo does not affect movement made by piloting an object in a level. This issue does not appear to be a regression. Versions Tested: This issue occurs in all versions te ...