DLC update from 1.0 deletes staging folder which unable to make incremental(patch) chunks

UE - Platform - Mobile - Feb 14, 2017

DLC update from 1.0 deletes staging folder which unable to make incremental(patch) chunks. ...

Fail to launch ('Attempt to build nav collision') on device when HLOD is generated

UE - AI - Feb 16, 2017

After generating HLOD, game launched from launch on device does not run correctly. 4.14 does not seem to have this issue, so this might be a regression. ...

Can't clear AnimBp reference from an old asset(4.10 or before) with a skeletalMeshComponent

OLD - Anim - Mar 2, 2017

When using an older asset(4.10 or before) with a skeletalMeshComponent in a newer engine version, a reference for the original AnimBP remains after changing the mesh component's Anim Class. ...

OnClicked event of UMG button fires once in twice if virtual joystick is receiving input.

UE - Editor - UI Systems - Oct 14, 2015

OnClicked event of UMG button fires once in twice if virtual joystick is receiving input. Both Andorid and iOS devices are affected. This issue is found with 4.9 update. under 4.8 are fine. ...

OnAudioPlaybackPercent Returning Incorrect Start Time of Play node with new Audio Engine

UE - Audio - May 2, 2017

The values returned by the OnAudioPlaybackPercent event node are incorrect when calling a sound to Play with a specific Start Time via blueprint when using the new Audio Engine i.e. AudioDeviceMod ...

Color Picker No longer Retains Hex Values

Tools - May 9, 2017

The color picker doesn't remember values pasted or entered into the Hex Linear or Hex SRGB field. ...

Object set to simulate via a LevelBp will not be affected by a radial force component

UE - Simulation - Physics - Jun 7, 2017

If the objects are set to simulate physics via the details panel it works fine If the objects are set to simulate physics via a level BP the radial force doesn't work Attached video shows you how to ...

Edit shared defaults for multiple blueprints leads to Engine crash.

UE - Gameplay - Blueprint - Jun 20, 2017

Changing any value in Edit shared defaults window with multiple blueprint assets leads to Engine crash. This is a regression from 4.16 ...

Slow response on clicking on InstancedStaticMeshComponent with many elements when using IME

Tools - Aug 7, 2017

When clicking on InstancedStaticMeshComponent with many elements, Editor memory usage increases and editor freezes until the operation is finished. The wait and memory usage get much worse when usin ...

Red 'X' gets displayed for stationary light in blueprint editor

UE - Gameplay - Blueprint - Sep 11, 2017

Stationary light in a blueprint gets displayed with red 'X' in Blueprint Editor viewport after opening the blueprint for the second time. ...