Details customizations with object references can cause map loading to fail.

Tools - Jan 23, 2018

This crash can be reproduced by adding a graph editor to a details customization.  This crashes because the graph editor is holding a strong reference to the graph object on the actor component duri ...

SimpleMoveTo does not work on Clients

UE - Networking - Jan 9, 2015

SimpleMoveTo does not work on Clients. ...

PixelNormalWS not working with Deferred Decals

UE - Graphics Features - Oct 14, 2016

Decals are no longer rendering correctly with PixelNormalWS plugged into the Emissive or Base Color input. ...

Cannot render more than one shot in a Master Sequence

UE - Anim - Sequencer - Oct 17, 2016

Cannot render more than one shot in a Master Sequence Regression: YES Worked: 3164219 4.14 Releases Broken: 3164583 4.15 Dev-Sequencer ...

Collision preset setting is not reflected correctly in case of original class inheriting Primitive Component

UE - Simulation - Physics - Aug 15, 2018

Collision preset setting is not reflected correctly in case of original class inheriting Primitive Component. Probably the cause is UPrimitiveComponent :: PostLoad (). Since FCollisionResponse :: U ...

Jittering appears when setting DOF in ES3.1

UE - Platform - Mobile - Oct 5, 2021

For reference, it was fine in 4.24 In particular, jittering is severe when the camera is moving. GaussianHalfRes has been removed in CL 14036168, which is likely to cause degradation issues if int ...

Rarely, unmodified Niagara will cause diffs and bloat the patch.

UE - Niagara - May 3, 2022

Attached is a project that picks up Niagara from the content sample. The probability of reproduction is about 1/10. The simpler the project, the lower the reproduction probability. I am attaching ...

Shading error after flipping normals on mesh

TM - Interoperability - Mar 11, 2025

As far as I can guess is that in the initial state of the object, the vertex normals are as they come from the DCC, but after the modeling operation they get recalculated somehow that doesn't match ...

Adaptive Tessellation is not updating correctly on moving mesh

UE - Graphics Features - May 28, 2015

User who has been working with an Ocean Shader for some time noticed that on updating to 4.8 Previews, the Adaptive Tessellation is not updating correctly when the mesh displaces from out of camera ...

Setting MaxWalkSpeed(MovementComponent) on server causes stuttering on Client

UE - Gameplay - Player Movement - Apr 4, 2018

Client stutters when changing MaxWalkSpeed. Did not occur in 4.18 ...