Attempting to set a new PIE window to Windowed Fullscreen mode causes both the new PIE window and the original Editor window to freeze and stop accepting input

Platform - Mac - Dec 24, 2018

When starting PIE in a New Editor Window on a Mac, the both the new window and original Editor window will freeze and stop responding to inputs if an attempt is made to change the window to Windowed ...

UClass::HasProperty() returns true for properties in a child class even though the comment for the function indicates it checks for the property in the current class and parents of the current class

Core - Dec 21, 2018

The comment describing UClass::HasProperty() indicates that it checks to see if a specified property exists in a class, or a parent of that class. However, when a property that exists in a child of ...

Unable to change Blueprint Child Variable values in Python

Tools - Python - Dec 20, 2018

Using the Python function unreal.SystemLibrary.set_bool_property_by_name() to change the default variable values of a child Blueprint do not work as intended. Tested in 4.20.3 (CL - 4369336), 4.21. ...

Extra column that cannot be edited is shown in Property Matrix when editing a Data Asset

Tools - Dec 19, 2018

When using the Property Matrix to edit a Data Asset, there is an extra column shown named "Native Class" that cannot be edited. This is most likely due to the code only checking to see if a property ...

Playing video in the Editor's Media Player on a Mac results in a degradation in quality with some noticeable banding present

Platform - Mac - Dec 19, 2018

Playing a video on a Mac using the Editor's Media Player results in the video appearing to have had its data compressed, and with an apparent decrease in quality. In particular, there is noticeable ...

APEX Plugin - Destructible Mesh creation no longer creates/assigns Mesh Material

Physics - Destruction - Dec 19, 2018

Destructible mesh material creation no longer creates/assigns DM array element with material from mesh. Workaround: Assign material manually after creating Destructible mesh Confirmed in MAIN @ CL ...

Build Plugin process fails with null reference exception when building a plugin that has "Can Be Used With Unreal Header Tool" set to true

DevTools - Dec 18, 2018

Trying to use UAT to build a plugin that has CanBeUsedWithUnrealHeaderTool set to true will fail due to a null reference exception (log from Main CL 4666322 attached). This happens because the plugi ...

Enable Slate layout caching Will cause the Stop/Play Buttons to disappear

Tools - Slate - Dec 17, 2018

When using the command Slate.EnableLayoutCaching 1, The Play button is removed from the tool bar after exiting play. ...

Cameras rotate incorrectly in Sequencer when using Key All and Auto-Key options

Sequencer - Dec 14, 2018

Sequencer is having issues handling a camera rotation going past -180 or 180 degrees with multiple keyframes when Key All and Auto-Key options are enabled. This results in unwanted 180 degree flip w ...

Animation Rate Scale does not appear to have an affect when blending an animation with two different Rate Scales

Anim - Animation - Dec 14, 2018

Rate Scale does not appear to have an effect when using a blend space that blends an animation with two separate Rate scales. ...