Calling InstanceStaticMeshComponent::AddInstance in code causes the editor to crash when setting non-Zero rotation

UE - Graphics Features - Aug 9, 2016

Attempting to add an instance to an Instance Static Mesh Component at runtime through code causes the editor to crash. ...

[CrashReport] UE4Editor_Engine!FHierarchicalStaticMeshSceneProxy::GetDynamicMeshElements() hierarchicalinstancedstaticmesh.cpp:1431

UE - Graphics Features - Jan 10, 2018

Currently no user comments on crashreporter Similar issue crashing in landscape file: [Link Removed] Logged this issue separately but wanted to provide that information. ...

Blackboard decorator node does not abort lower-priority nodes

UE - AI - Feb 16, 2026

When a branch of a selector is deactivated, all auxiliary nodes and observer delegates are removed. If the branch is reactivated soon and the CurrentActiveNode remains unchanged, the behavior tree l ...

Overlapping isn't updated on replicated components after SetWorldTransform

UE - Networking - Dec 10, 2015

Overlapping isn't updated on replicated components after SetWorldTransform. Updating the transform on the Actor itself updates the overlapping as expected. Reproduced in 4.10 and Main (CL# 2798114) ...

Nanite displacement issue when using along non-uniform scaling

UE - Rendering - Graphics Features - Nanite - Feb 26, 2026

Nanite Tessellation displacement direction is incorrect for landscapes with non-uniform scales. It seems to use the normal from the unscaled landscape, which can result in the displacement causing t ...

Blueprint derived from C++ class not saving correctly

UE - Gameplay - Blueprint - Jul 27, 2015

The blueprint that the user is using loses some data when the editor closes and reopens despite saving all of the content. Note: Currently unsure of what exactly causes this but as I am able to rep ...

Crash with geometry collection in es3.1 preview

UE - Simulation - Physics - Destruction - Dec 22, 2020

Child component reports Parent during On Hit events instead of itself

UE - Simulation - Core - Sep 12, 2022

This is a regression tested in //UE4/Release-4.27 cl18319896 Child collision component reports its' Parent during On Hit events instead of itself.  ...

Render Movie using separate process crashes capture process

OLD - Anim - Jan 14, 2017

This is a regression exposed at CL 3242934 - QAGame: Adding test content to QA-Sequencer for Override Bindings. Crash does not occur in 4.16. I'm not certain how the content changes are triggering ...