Crash after renaming Blueprintable DataAsset

UE - Gameplay - Blueprint Editor - Nov 21, 2018

Renaming a blueprint instance of a DataAsset which has been used as the parent class of a DataAsset will cause a crash. ...

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 ...

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). ...

Selecting Two Sided Foliage In Editor with Material Layers Enabled Causes Crash

UE - Graphics Features - Nov 20, 2018

With material layers enabled, selecting two sided foliage will cause the engine to crash. This is working as expected in 4.20 CL# 4369336. Found in 4.21 CL# 4541578 and 4.22 CL# 4573698 This is a ...

Simulated ability tasks not being cleaned up in UActorChannel::ReplicationMap

UE - Networking - Nov 20, 2018

I've noticed the issue occurring in both 4.20.3 (CL 4369336) and 4.21.0 (CL 4541578). The user on AnswerHub has also noticed the issue in 4.20.2 (CL unknown) and claims the issue did not occur in 4. ...

Editor running with "DebugGame Editor" configuration fails to launch (This happens only on 4.21 via Launcher)

UE - Foundation - Cpp Tools - Nov 20, 2018

This happens only on 4.21 via Launcher. UE4 editor running with "DebugGame Editor" configuration fails to launch The error log is below. ERROR: System.IO.DirectoryNotFoundException: Could not fin ...

URLs aren't parsed correctly when running multiple listen servers on one machine

UE - Networking - Nov 19, 2018

According to the UDN thread, a second listen server started on a machine will not process the travel URL correctly and fail to actually load a map in listen mode. ...

WMR native plugin trigger axis not working

UE - Platform - XR - Nov 19, 2018

We are testing the new Windows Mixed Reality native support and have found that the trigger mapping to a button is working, but the trigger mapping to an axis is not, i.e. the event MotionController ...

DPI Scale Rule set to custom can cause performance issues during design time

UE - Editor - UI Systems - Nov 19, 2018

When setting the DPI Scale Rule to custom and using a named slot the frame rate of the editor will drop while zooming in and out of a widget that uses the widget containing the named slot. ...

Filling Vertex Colors does not propogate down to other LODs

Tools - Nov 19, 2018

The original reported behavior called out that filling individual channels did not apply to LODs when LOD Model Painting = False. With changes implemented in 4627582, the initial fill will reach LOD ...