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. ...

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. ...

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. ...

Crash on opening a pose asset after reloading a skeletalMesh with bone name changes

OLD - Anim - Nov 6, 2017

Opening an old pose asset can crash the editor if the skeleton it uses gets updated. ...

InputChord "None" replaced with "Any Key" on reopen

UE - Gameplay - Blueprint Editor - Jan 22, 2018

For the FInputChord struct, in Blueprints assigning the value "None" to Key will be reassigned to the next time the Blueprint is opened. This is problematic for handling key bindings in Blueprint w ...

Parent Construction Script executes on child when disconnected

UE - Gameplay - Blueprint - Apr 23, 2018

If you create an Actor with Construction Script logic and create a child based on that Actor the Parent Construction Script is being executed even after disconnecting the node. ...