Unreal Engine Issues

Selecting with eyedropper tool will select ChildActor

It can select ChildActor with the Eyedropper tool. Since ChildActor is an actor created temporarily, when you restart the Editor it becomes empty because there is no reference. When selecting AActor ...

Static Mesh 's Light Map Coordinate Index set to 4 and execute a light build, the result will be incorrect.

Light Map Resolution is set to a small value (4 or 8), it will build normally. ...

Memory Leak during video playback when main thread blocks

Video frames are stored in a queue that keeps growing until the main thread ticks again. Can also be reproduced by playing video then clicking the import file button and leaving the file import dial ...

Grass on landscape Component was messed up when painting blend mask if this component has LODBias>0

Changing setting in RecastNavMesh breaks "reference" to NavMeshBoundsVolume

When you create a NavMeshBoundsVolume, it automatically creates a RecastNavMesh-Default. You can change the settings of the nav mesh there. However when you change settings of this RecastNavMesh it ...

Load times for the editor appear to have increased

The editor appears to have longer load time as compared to an older engine version (4.20.3 loaded in seconds while newer version appear to load the same project in over a minute) ...

Crashes when copying an array of actors that implement an interface into an array of interface references

When assigning an array of actors that implement a specific interface to an array of the specific interface the engine crashes. This doesn't happen if the actor array is put through a for each loop ...

Asynchronous Image Loading from Disk Documentation leads to memory leak

The documentation example to create your own asynchronous image load from disk results in a memory leak that is noticeable using the task manager.  ...

Duplicating a static mesh with foliage attached breaks connection

Editor Crash when trying to get Color data from Vertex buffer

When attempting to get the vertex color of an instance of of a static mesh that is painted after placing it in the World Viewport. The Editor crashes returning an "Unhandled Exception". The cause o ...