Unreal Engine Issues

Hot Reload fails if a project and Engine are placed next to each other in the same root folder that has the same name as the project

Hot Reload does not work if a project and the Engine that project is associated with are placed next to each other in the same root folder that shares the same name as the project. During the Hot Re ...

When having two viewport panes open in editor, and piloting/unpiloting a camera actor in one pane, will cause the other pane to reset viewport camera orientation.

Piloting and "Un-piloting" a camera Actor in viewport pane causes other viewport panes to reset its view orientation upon "Un-piloting" of Camera Actor. ...

Nativized packaging fails when attaching paper Flipbook component to a parent paper Flipbook component that is Inherited.

Nativized packaging fails when attaching paper Flipbook component to a parent paper Flipbook component that is Inherited. ...

Crash editor when open the level sequencer after updated 4.20

When migrating from the version before 4.20 to the version after 4.20, opening the level sequencer will crash. I think that there is a problem with conversion from SnapTimeInterval (FixedFrameInterv ...

Crash when executing Rename Asset or Duplicate Asset and other functions in Scripted Actions

In Scripted Actions, if you execute a function after using Rename Asset or Duplicate Asset, it will crash. If you do not execute the function it will not crash. ...

Packaged C++ Project Fatal Error on Startup When Spawning Niagara System Via a Character Blueprint

Using the system blueprint node in the character blueprint will cause the packaged game to give a fatal error when running the executable. This only occurs when in a C++ project. Found in 4.20 CL# ...

Particle memory can be corrupted leading to a crash

Race condition in the late update manager

https://udn.unrealengine.com/questions/476212/race-condition-in-lateupdatemanager.html In short, the trick storing a pointer to the packed index of the primitive does not work as it is simply a p ...

VertexInterpolator Makes Landscape Materials Fail to Compile

If a VertexInterpolator is used in a material that is applied to a landscape the material will fail to compile. Found in 4.20 CL# 4369336, 4.21 CL# 4.21 CL# 4613538, 4.22 CL# 4681912 ...

Splash Screen disappears too quickly on Mobile resulting in a long black screen before game starts

A user has reported that the Splash screen for Mobile games does not last as long as it did in previous versions, resulting a longer black screen before the initial map loads. Regression?: Yes This ...