Unreal Engine Issues

Crash when setting Kill Particles to true on some emitters in a Niagara System

When setting the Kill Particles boolean of an emitter in a Niagara System to true, the editor crashes. So far, I've only been able to reproduce the issue with the NS_EH_KP system that a user provide ...

FileSystemDerivedDataBackend may output a corrupted access log

This problem is caused by the AccessLogWriter has not been flushed at the termination. The following workaround flushes the Writer.class FFileSystemDerivedDataBackend : public FDerivedDataBackendInt ...

Stacked shots will evaluate both sub sequences instead of just the topmost

Overlapping shots will evaluate all shots instead of the topmost one. ...

StaticMesh - CustomDepth breaks occlusion culling without custom depth enabled

Editor becomes unresponsive for long periods between edits of a user-defined enum type when it's referenced by one or more user-defined struct types.

After adding a member to a user-defined struct type and changing the member type to a user-defined enumeration, repeated edits to that enumeration will eventually cause the editor to become increasi ...

Sorting objects at EndLoad has a non-deterministic behavior

This non-deterministic behavior is caused by sorting by program address. ...

Crash in editor when loading a procedural mesh that has multiple sections and raytracing is enabled

Crash on multi viewport when streaming in sub level with rect lights

Apex Destructible meshes are disappearing at certain distances during Runtime.

Green spheres at "4.3 - Destructible Assets" flash in an out of view. Can not be viewed on the left of the spheres.When playable play is close to the spheres they disappear no matter the position.Gre ...

Fast Path pin update can break when anim BP compilation generates warnings

It seems that a Anim BP that generates a warning will break the updating of pins that are connected via fastpath in other parts of the graph. This was reported on the following UDN: [Link Removed] ...