Copy-pasting custom property nodes (ControRig etc.) results in invalid bindings, perf issues

UE - Anim - Rigging - Control Rig - Jul 28, 2025

From this UDN: [Link Removed] Suggested fix:Override PostPasteNode to perform the GUID update andAdd validation on load to strip 'invalid' copies that do not correspond to a valid pin input ...

Crash when using "ILCQ Volume" and "Distance Field Indirect Shadow" in VR

UE - Platform - XR - Jul 17, 2017

Crash when using "ILCQ Volume" and "Distance Field Indirect Shadow" in VR ...

Cannot call blueprint events on CDO

UE - Gameplay - Blueprint - Jun 27, 2017

Attempting to call a blueprint event on a CDO object causes the editor to crash. Regression: Yes- Repro steps did not crash editor in binary 4.15.3 (CL 3450819) ...

Crash when updating instanced subobjects in a USTRUCT

UE - Gameplay - Blueprint - Jul 5, 2017

Attempting to edit array of instanced subobjects causes the editor to crash. ...

Geometry Material Alignment not functioning in 4.8

Tools - Jun 15, 2015

Material Alignment on BSPs are not functioning in 4.8.0 Release. This is a regression from 4.7.6. The issue does appear to be fixed and functional in 4.9 (Promotable-CL-2581018) ...

GameMode::StartNewPlayer calls RestartPlayer() without checking PlayerCanRestart()

UE - Gameplay - Nov 11, 2015

Bug report from UDN thread. https://udn.unrealengine.com/questions/266937/gamemodestartnewplayer-calls-restartplayer-without.html#answer-268579 His point seems sound, we should fix it. ...

[CrashReport] FBX import crash - UE4Editor_UnrealEd!TSet<TPair<unsigned int,FMeshSectionInfo>

Tools - Jan 12, 2017

This crash was introduced in 4.14.2, and is very similar to [Link Removed], however it is still occurring in 4.14.3 (after that fix) According to submitted crash reports, this one is not very wides ...

SceneDepth Materials Rendering Black

UE - Graphics Features - Jun 2, 2017

Scene Depth materials are rendering completely black. See the attached screenshots for comparisons between 4.15.3 and 4.16. This issue did not occur in 4.15.3, this is a regression. ...

Nativize BP Package fails when using Sub Anim Instance with exposed variables

OLD - Anim - Jun 26, 2017

When using exposed variables on Sub Anim Instance nodes, packaging with nativize blueprints fails Tested on: 4.15 - 3450819 4.16 - 3466753 4.17 - 3502710 ...

Play rate affects all blendspace samples using the same Anim Sequence

OLD - Anim - Jun 27, 2017

Play rate affects all blendspace samples using the same Anim Sequence Occurs on? 4.15 - 3450819 - YES 4.16 - 3466753 - YES 4.17 - 3502710 - YES ...