Unreal Engine Issues
Unreal Engine Issues
Instances In a Hierarchical Instance Static Mesh Component Don't Retain PerInstanceRandom Values When Rotated
UE - Graphics Features - Dec 9, 2019When an instance in a Hierarchical Instance Static Mesh component is rotated using "Update Instance Transform" it doesn't retain it's material's base color value when the material uses PerInstanceRa ...
Network Emulation outgoing dropped packets on client higher than expected
UE - Networking - Oct 14, 2022Under certain network emulation settings, it looks like outgoing packets from the client will be dropped in groups (around 4 or more packets at a time) rather than individually. This leads to the ac ...
SetOneWayInteraction functionality has no effect on the simulation
UE - Simulation - Physics - Nov 11, 2022Calling SetOneWayInteraction on a BodyInstance has no effect within the physics engine. The state of the flag is passed in to Chaos but nothing actually uses the value once it is there. It is expe ...
[Interchange] Crash on asset re-import
UE - Editor - Content Pipeline - Import and Export - Feb 7, 2025We've started seeing a crash in editor when re-importing one of our assets. <pre class="ql-syntax">Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 783] Array index out of ...
Changing class of Sub Anim Instance will crash if tag is specified
OLD - Anim - Mar 1, 2019Switching sub anim instances that have a set tag will crash the editor when compiled. This is likely due to the use of Tag as the object name. The tag does not change, and the old UObject is still a ...
Deleting the first instanced subobject entry from a Blueprint map or set variable's default value can result in an editor crash.
UE - Gameplay - Blueprint Compiler - Sep 27, 2021Deleting the first instanced subobject entry from a default value for a map or set variable can result in accessing an incorrect subobject for the element's value during reinstancing, which can then ...
Decals spawn differently than 4.10.4 with their rotation based on hit normal
UE - Graphics Features - Apr 5, 2016Decals are not spawning correctly when spawning based on a rotation value from the hit normal. There is a difference in how this is handled from 4.10.4 to 4.11 and even 4.12. See attached image fo ...
[CrashReport] UE4Editor_ShaderCore!FVertexFactory::SetPositionStream() [vertexfactory.cpp:218]
UE - Graphics Features - Aug 17, 2018User comment in crash group:error when i reimpot a mesh from a .fbx create in 3d max 213 void FVertexFactory::SetPositionStream(FRHICommandList& RHICmdList) const 214 { 215 ...
UMG Animations on existing widgets break when loading new level
UE - Editor - UI Systems - Jan 14, 2021Marking as a regression as this does not occur in 4.25.4 User description: I want to have UMG UI that persists for the lifetime of the game so I create my root widget and add it to the viewport fr ...
Certain options don't display in Context Sensitive search for Widget Blueprint until opening a regular Blueprint
UE - Gameplay - Blueprint Editor - Jan 3, 2023Context Sensitive searches in Widget Blueprints is not working as expected in 5.1. I was able to reproduce this 4/4 times in 5.1, and confirmed that this issue is a regression as the search works as ...