Using the "Convert Selected Components to Blueprint Class" feature on two blueprints will cause a crash

UE - Gameplay - Blueprint - Aug 12, 2015

When trying to make a prefab (using the Convert Selected Components to Blueprint Class method )out of existing blueprints the editor will crash. ...

Creating a blueprint from selected components crashes editor if components contain a blueprint with a component

UE - Gameplay - Blueprint - Nov 4, 2015

Frequency: 2/2 Crash Reporter: [Link Removed] Editor crashes if the option: "Convert Selected Components to Blueprint Class" is selected from main editor viewport>Blueprints context menu. This occu ...

Renaming actors between levels during PIE causes issues

UE - World Creation - Worldbuilding Tools - OFPA - Dec 4, 2023

When renaming actors during PIE the actor generates a new, non memory/temporary, actor package underneath the PIE world- this is then causing checks in EnumerateMemoryAssetsHelper (in AssetRegistry. ...

Landscape can be added as a source in take recorder

UE - Anim - Sequencer - Jan 25, 2021

Landscapes should not be able to be animated in sequences, and should not appear as options for sources in take recorder.  ...

Crash when interacting with an Actor containing an Instanced Static Mesh that is in a Locked level

UE - Editor - Mar 30, 2023

This is not a regression. Tested in //UE5/Release-5.1 CL23901901 Editor crashes with an assertion after interaction with an Instance Static Mesh component that is in a locked level. This doesn't af ...

During SIE (simulate) and ejected-PIE, modifying a map actor causes triggers RerunConstructionScript() which discards all runtime modifications to SCS components

zComponent - Archive - Sep 6, 2024

When Simulating, or Playing-In-Editor and ejected, modifying an actor in the editor world causes the SIE/PIE runtime actor to recreate its blueprint added components via AActor::RerunConstructionScr ...

'Malformed sequence hierarchy' ensure hit after modifying sub-sequence tracks

zComponent - Archive - Sep 5, 2025

It's possible for there to be multiple instances of the same sequence in the evaluation states cache if the same sequence is used in multiple sub-sections. Caches are never removed from the evaluat ...

Crash when creating a local variable inside of a collapsed node graph that has been copied

UE - Gameplay - Blueprint - Nov 5, 2015

If the user creates a function with local variables and then collapses the variables down into a collapsed graph and then duplicates this collapsed graph the variables in the second graph will be gr ...

Editor crashes when an Animation Blueprint Template is compiled with 'Layered Blend Per Bone' node

UE - Runtime - Animation - Mar 17, 2022

Editor crashes when an Animation Blueprint Template is compiled with 'Layered Blend Per Bone' node. ...

Ensure thrown when applying a Linear Color User Exposed Variable in a Niagara Emitter

UE - Niagara - May 20, 2022

This is a regression tested in //UE4/Release-4.27 CL18319896. Ensure thrown when applying a Linear Color User Exposed Variable in a Niagara Emitter. ...