Adding a Blueprint Interface (with function named "Test") to a Widget Blueprint with a variable named "Test" crashes the editor when compiling

UE - Gameplay - Blueprint Editor - Oct 5, 2017

Giving the Blueprint Interface Function and the Widget Blueprint Variable the same name, then adding the Blueprint Interface to the Widget Blueprint, causes the editor to immediately crash when comp ...

Skeletal Mesh scales incorrectly if RigidBody node is used in Animation Blueprint, then the character blueprint is scaled

OLD - Anim - Nov 27, 2017

Skeletal Mesh scales incorrectly if RigidBody node is used in Animation Blueprint and then the character blueprint is scaled. If the character blueprint is scale to extreme sizes (3.0) the effect i ...

Building Lighting fails when lightmass importance volume scale is large

UE - Graphics Features - Jan 30, 2018

There is an issue when attempting to build lighting with a large lightmass importance volume when you build the lighting the editor freezes. This issue appears to be a regression Versions tested: 4 ...

Generate Particle Event Blueprint node doesnt generate particles at relative "InLocation"

UE - Niagara - Apr 3, 2018

The EventReceiver Spawn module doesnt seem to take in parameters from linked Particle Generated Event. When setting the location of the Blueprint node (In Location), the relative position of the Par ...

Event Dispatcher implementation called several times (number of bound refs increases every compile)

UE - Gameplay - Jun 26, 2018

The number of calls to the Event Dispatcher increase each time the blueprint actor containing the reference is compiled. This issue was not present in 4.18.3 (CL-3832480) but is in 4.19.2 (CL-403378 ...

GPU Particles Don't Spawn at Correct Location When Used as Collision Event Receiver

UE - Niagara - Oct 8, 2018

GPU emitter doesn't spawn particles at expected location when it is an event receiver. Also disabling Interpolate Spawning in the emitter properties affect this behavior as well, making the particle ...

Progress Percent is removed from UMG Progress Bar when Transform Shear value is changed

UE - Graphics Features - Nov 8, 2018

Modifying the Shear values on a Progress Bar in a Widget Blueprint cause it to lose its Fill Color and set Progress. This is a regression from 4.20.3 (CL-4369336). Reproes with -vulkan on both Linux ...

UCanvasPanelSlot::PostEditChangeChainProperty does not call Super function

UE - Editor - UI Systems - Nov 13, 2018

UCanvasPanelSlot::PostEditChangeChainProperty not only does not call its Super function unless the anchor node has been set, but it calls Super:: PostEditChangeProperty instead PostEditChainProperty ...

Converting an Actor to spawnable/possessable in Sequencer makes it lose its position in the Track Panel.

UE - Anim - Sequencer - Nov 15, 2018

Converting an Actor to spawnable/possessable in a Sequence causes it lose its position in the track panel. If the Actor was in a folder it will need to be added back to that folder. This was report ...

Slight menu lag when using Vulkan on Linux

UE - Platform - Linux - Dec 12, 2018

When using the UE4 Editor with Vulkan there is a slight lag when navigating through the menu options. This lag is not present when launching with OpenGL nor is it present on Windows with -vulkan.  ...