Long delay on iOS Device Output Log can cost loss of logging on some devices

UE - Platform - Mobile - Feb 8, 2019

If the delay to begin printing the log to the window is too long, some of the logging can be thrown out. This issue does not occur with Android Device Output log UPDATE1: The last time I reproduce ...

Hot reload can no longer be performed after adding an empty class to a Blueprint-only project

UE - Foundation - Core - Feb 7, 2019

Adding an empty code class to a Blueprint-only project prevents the project from being able to perform any hot reloads. When clicking the Compile button in the Editor, a warning is added to the log ...

Piloting Actors and Cameras does not have expected results when focusing and orbiting

Tools - Feb 7, 2019

Piloting a camera or actor in the scene does not have expected camera controls when focusing and orbiting something while holding Alt. ...

OnAudioPlaybackPercent doesn't work after restarting the project

UE - Audio - Feb 7, 2019

Using the OnAudioPlayback event in Blueprints does not work when playing the audio component its connected to while PIE, after restarting the project. Tested in 4.20.3 (CL - 4369336), 4.21.2 (CL ...

Niagara Grid Location Module spawns particles off center

UE - Niagara - Feb 5, 2019

the GridLocation module spawns particles off center. ...

Project Version setting not reflected in a project's packaged executable's property details

UE - Foundation - Cpp Tools - Feb 5, 2019

When a Project Version value has been specified in the Project Settings, this value is not set into either the File Version value or the Product Version value in a packaged game. The File Version va ...

Material Opacity Mask Not Working As Expected in PIE but Does in Standalone

UE - Graphics Features - Feb 5, 2019

Material Mask Opacity is not working in PIE, but works as expected in Standalone.  Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4862710, and 4.23 CL# 4898645 ...

Scrollbox no longer works after being Collapsed (and made visible again) when using remote session

UE - Editor - UI Systems - Feb 5, 2019

Scroll box no longer scrolls after the visibility has been set to collapsed and back to visible. This only appears to occur when using Remote session. Additional info on setting up remote session: ...

Data Tables with 'ParticleSysParam' structs cause crash

UE - Niagara - Feb 4, 2019

Data Tables with 'Particle Sys Param' structs in them as variables will crash when opened. ...

Weird results in lightmaps after update to 4.21.2

UE - Graphics Features - Feb 4, 2019

Reported by our licensee Gungho. Reproduced in 4.21.2, win10 ...