Unreal Engine Issues

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 ...

unnecessary warning message regarding edge case rotations from deltagen fbx import

The 'Set Constrained Components' node doesn't set the physics constraint components correctly if used in the Construction Script

The 'Set Constrained Components' node doesn't set the physics constraint components correctly if used in the Construction Script. ...

Filling Vertex Colors does not propogate down to other LODs

The original reported behavior called out that filling individual channels did not apply to LODs when LOD Model Painting = False. With changes implemented in 4627582, the initial fill will reach LOD ...

User Play Space Rot does not change anything in Client Play Camera Shake

User does not change anything in Client Play Camera Shake. Reproduced in 4.8 and Main (//depot/UE4/Promotable-CL-2581498). This is a Regression: it works as expected in 4.7.6 ...

Latent Blueprint Functions has incorrect linkage when the FLatentActionInfo is the first argument

When you create a latent function in C++ with the FLatentActionInfo first it will incorrectly set up the linkage for the latent info such that it gets linked to the incoming execution pin of the fun ...

Instanced EditInlineNew Objects not correctly propagating to children and placed level instances

Instanced EditInlineNew objects are kind of broken right now and hard to make full use of. In addition to the notes above, there are some cases where you can't even assign new values into the base c ...

Translucent light grid injection behavior

Light injection into the Translucent Light Grid voxels does not use the correct location for clipping or attenuation. Both of these points are outside the voxel that is being updated. Light attenua ...

Physics enabled Child Actor components that spawn with with a delay, always spawns at world origin

Physics enabled Child Actor components that spawn with with a delay, always spawns at world origin **This is a regression. It was working in 4.11.2 Could also be related to: [Link Removed] User D ...

Trace complex for assets simulating physics does not show accurate collision

When using Trace Complex in a LineTraceByChannel node does not give accurate results when object is simulating physics and scaled. The scaled root mesh in the BP will only register its collision rat ...