Crash on Linux and Windows with Vulkan when adding Atmospheric Fog to a Level

Rendering - Dec 5, 2018

Adding an instance of Atmospheric Fog to a Level causes the Editor to crash on both Linux and Windows when using Vulkan. There is a different callstack when SteamVR is enabled on Linux which is also ...

Behavior Tree has missing Service Nodes on project load

Gameplay - AI - Dec 4, 2018

In the project is Behavior Tree that implements some tasks, decorators and services, but for some reason, two of my tasks nodes gets initialized with all the pointers to their services set to null, ...

Actor Component properties can become "linked" across multiple Blueprints after a hot reload

Gameplay - Components - Dec 3, 2018

If code in an Actor Component class is changed (eg. a new UPROPERTY is added) and a hot reload is performed to implement the changes, the properties in the component can become linked across any Blu ...

Set node for a key variable returns "(" instead of "None" when set to none (if not previously set to anything)

Gameplay - Blueprint - Dec 3, 2018

When setting a key variable to none (without setting it to anything else first) the variable will return "(" instead of none ...

Get HMD Worn State does not appear to working as expected for HTC Vive

Virtual Reality - Dec 3, 2018

The Get HMD worn State does not update the worn state when the headset is put on/taken off. Rather it only updates when the headset sleeps or wakes ups. This means that the headset can be taken off/ ...

Cannot use "ProjectName (Debug) (ProjectName)" debug configuration in VSCode on Mac with binary Engine installation

Core - Dec 3, 2018

Attempting to debug in VSCode on a Mac using the ProjectName (Debug) (ProjectName) configuration fails due to a missing precompiled file in the binary Engine installation. REGRESSION: No. The same ...

Get time to closest marker stops returning values after markers are added to other animations

Anim - Nov 30, 2018

When Sync Markers are added to other animations, the Get Time to Closest Marker node stops returning any information. ...

Rhino extrusions have high tessellation values after being imported with DataSmith

Datasmith - CAD - Nov 28, 2018

When importing Rhino 'Extrusions' with Datasmith results in extremely dense meshes. A simple box can end up having thousands of vertices. This issue was reported and tested in 4.21 (4.21E0). This ...

Unreal Frontend crashes when loading a ue4stats file

Core - Nov 27, 2018

If Unreal Frontend has been built in the Development Editor configuration, attempting to open a ue4stats file in the Profiler tab results in the Unreal Frontend crashing. The crash does not occur if ...

Setting KeepState as default in LevelSequences makes Sequencer blend animations not as expected

Sequencer - Nov 27, 2018

Setting "Keep State" for an animation in sequencer makes the sequence behave differently in Sequencer and in Play Mode. The animations appear to be blending together instead of having normal transit ...