The "alignas" keyword cannot be used with a USTRUCT

UE - Foundation - Core - Oct 24, 2018

The alignas keyword is not usable with a USTRUCT. It can be used with a normal struct. ...

A crash in editor will result after swapping inherited SCS component names at the parent class level before loading a child class that overrides them.

UE - Gameplay - Blueprint - Oct 26, 2018

This is an editor-only crash that's due to stack overflow/infinite recursion in UInheritableComponentHandler::FixComponentTemplateName(). We are recursively trying to rename other inherited componen ...

Creating a Blueprint Variable for InputActionKeyMappings, and then removing the default input parameter causes crash.

UE - Gameplay - Input - Nov 9, 2018

Upon creation and compilation of a Blueprint Variable of type InputActionKeyMappings, when clicking the "X" to remove the default input key parameter causes the editor to crash. ...

Adding HISM instance on a Dedicated Server causes a crash

Tools - Nov 14, 2018

Adding an instance of an HISM on a dedicated server causes an assert. Regression?: No This occurred in 4.20 ...

Packaging to HTML5 fails when Online Framework is enabled

UE - Online - Nov 17, 2018

Packaging a project to HTML5 while Online Framework is enabled seems to cause packaging failures. It produces the following errors from the Output Log:   PackagingResults: Error: unresolved symbol: ...

Simple HMD VR preview left eye color issue

UE - Platform - XR - Nov 21, 2018

The left view in simple hmd (when no HMD is in use) will appear different from the right. All assets in the left view will appear one color (example image attached). ...

Custom CrowdManagerClass reference is set to none when restarting the Editor

UE - AI - Nov 21, 2018

When setting a C++ class that's derived from CrowdManager as the "Crowd Manager Class", will cause the "Crowd Manager Class" value to be set to "None" when the Editor is restarted. This issue was r ...

Reversed Animations don't play properly using Skeletal Mesh Pose and animations with Keep State in Sequencer

UE - Anim - Sequencer - Nov 26, 2018

The bug seems to only reproduce when setting animations in sequencer and only if the animations are set to "Keep state". Setting them to "restore default" makes the reversed animation play correctly ...

Use Mouse for Touch leads to fire Released and Clicked with Pressed at the same time for UMG Button

UE - Editor - UI Systems - Nov 23, 2018

Pressed, Released and Clicked should be fired in the same manner w/wo Use Mouse for Touch option. These three events are fired at the same time when enabling the option. [Image Removed] ...

Custom Stencil Is Not Rendering In UI Materials

UE - Graphics Features - Nov 30, 2018

Widgets with a UI Material that uses Custom Stencil will not render meshes with a set stencil. This is working as expected in 4.19 CL# 4033788. Found in 4.20 CL# 4369336, 4.21 CL# 4541578, and 4.22 ...