Niagara crash when duplicating an emitter in the timeline through right-click menu

UE - Niagara - Dec 11, 2019

Trying to duplicate an emitter from the timeline crashes the editor. This looks to be the result of UMovieSceneNiagaraEmitterTrack not implementing the function SupportsType.  ...

Material Instance Parameters Undo Doesn't Update Values

Tools - Dec 11, 2019

Material Instance parameters do not update values when the user does an Undo (Ctrl+Z). An example project is attached. This seem related to [Link Removed]. Found in 4.24 CL#10570792 Reproduced in ...

Engine Crashes When Converting an Int to Float For a Map Key In Blueprints

UE - Gameplay - Blueprint Editor - Dec 11, 2019

The engine crashes when trying to automatically create a type conversion node when they are used a key for a map. Found in 4.24 CL#10570792 Reproduced in 4.25 Main CL# 10646676 ...

[CrashReport] UE4Editor-D3D11RHI!FD3D11RenderQueryBatcher::PerFrameFlush() [D3D11Query.cpp:45]

UE - Graphics Features - Dec 11, 2019

Generated from CrashReporter ...

Blueprint Actor cannot delete implemented interface when Interface is converted to an Event.

UE - Gameplay - Blueprint - Dec 11, 2019

In Editor, When you remove a return value parameter from a Blueprint Interface function's Output Category. (so there are no return values), it becomes an event. In any Blueprint that implements the ...

UI tall menu flickers with windows scaling

Tools - Dec 11, 2019

Tall menus are flickering that can not do anything with it when windows scaling is set.  (Please watch the attached video file) My setup: 3840x2160, 150% scale in the window ...

Sub Instance Root Motion issues

OLD - Anim - Dec 10, 2019

Using multiple Sub instances with root motion does not behave as expected. With both the parent and sub instances set to 'Root Motion from Everything': In 4.22, too much root motion occurs. In ...

When doing mesh(SK and SM) re-import, package UMetaData is lost

UE - Editor - Content Pipeline - Import and Export - Dec 10, 2019

To add some meta data to an asset you need to do a "Editor Utility Widget" I create a button that add the metadata to a specific assets here is the onClick graph of my button [Image Removed] I us ...