Mentioning "_Validate" suffix in code comments to function names causes Compiler error

Core - UnrealHeaderTool - Dec 13, 2019

When mentioning the _Validate Suffix in code comment, Visual Studio compiler throws an error. ...

Simulating forking bones ignores import scale

Physics - Dec 12, 2019

Simulating the children bodies, but not the parent, of a skeletal mesh imported with a uniform scale not equal to 1, seems to ignore the imported scale, instead using their initial relative location ...

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

Rendering - 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.  ...

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

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 ...

EPhysicalSurface metadata is not updated with Physical Surface Project Settings

Physics - Dec 6, 2019

Changes to 'Project Settings -> Physics -> Physical Surface' do not update the Enum metadata of the EPhysicalSurface until Project Settings is re-opened. EPhysicalSurface Enum metadata is set i ...

Grandchild actor with IsEditorOnly enabled is duplicated during save the level.

Gameplay - Components - Dec 6, 2019

IsEditorOnly is not reflected in grandchild actor when parent/child/grandchild are constructed with ChildActorComponent. This causes the issue that actor will increase incorrect when save the level. ...

Physics does not replicate for non root components

Physics - Dec 4, 2019

A root component can be properly replicated, but non-root components won't have their collision replicated, only their visible mesh.  ...

Shift Fonts Metrics when using a high-resolution monitor

Tools - Dec 4, 2019

[Image Removed] ...

Instanced Foliage Actor painted on an Actor who is attached to a Parent Actor, does not update transform when Parent is moved.

Tools - Foliage - Dec 2, 2019

Instanced Foilage Actor painted on an Actor who is attached to a Parent Actor, does not update transform when Parent is moved. Note:  The foliage will move if the base actor is moved directly, inde ...

Crash when changing "MaximumTextureSize" in "LeaveExistingMips" state

Tools - Import - Dec 2, 2019

No problem with 4.22.3 ...