Saving a Slate Vector Art asset causes a crash

UE - Editor - UI Systems - Mar 17, 2022

Saving a Slate Vector Art asset causes a crash. ...

Ensure undoing pin split - Found K2Node_CallFunction_429 ('K2Node_CallFunction') that does not belong to EventGraph.

UE - Gameplay - Blueprint Editor - Sep 15, 2017

REGRESSION: Yes, does not occur in 4.17.2 Ensure occurs when undoing the splitting of a pin. ...

Engine crashes when trying to copy a setter node for a GameplayTag variable from one eventgraph to another eventgraph

UE - Gameplay - Sep 27, 2019

When trying to copy a setter node for a GameplayTag variable from one eventgraph to another eventgraph the engine crashes. If the blueprint that is copied into has a GameplayTag variable with the sa ...

[AI] BehaviorTreeEditor crash when swapping from Behavior Tree to Blackboard view.

UE - AI - BehaviorTree - Aug 24, 2023

The first time that a Behavior Tree editor window changes from the tree to the Blackboard can cause a crash if you add and remove a key from the Blackboard via a different Behavior Tree editor windo ...

Crash when deleting mesh instances of a HISM component

UE - World Creation - Worldbuilding Tools - Foliage - Apr 24, 2019

When trying to delete an existing (and saved) mesh instance from a Hierarchical Instanced Static Mesh component the Editor crashes due to a failed assertion, however clearing all instances does not ...

Crash on Build All Levels

UE - World Creation - Worldbuilding Tools - HLOD - Apr 7, 2022

Crash on Build All Levels after a HLOD warning. EXCEPTION_ACCESS_VIOLATION reading address 0x00000000000000f0 ...

Editor crashes when right clicking a box collision after adding a converted static mesh in blueprint editor

UE - Gameplay - Blueprint - Sep 1, 2016

I created a cylinder with a subtractive cylinder inside of it. I also used a box BSP with a subtractive box inside of it and got the crash to repro. I tried with a sphere BSP twice and didn't get ...

Editor Crashes when copy/pasting an emitter in the Niagara timeline

UE - Niagara - Feb 8, 2023

When creating the emitter's track widget we search for the stack view model's root entry, but the stack view model pointer is null, so we crash.  ...

HTML5 - View is incorrectly drawn

UE - Platform - Mobile - Sep 23, 2016

The view in a packaged HTML build will not draw the game view as the entire view space, neither in custom sized window nor fullscreen. ...

Crashes when attempting to use an Instanced Struct inside Control Rig / Rig VM

UE - Anim - Rigging - Control Rig - Mar 17, 2025

Currently, the Control Rig Editor allows the user to use the "Instanced Struct" type, for example for a variable or function input/output. However, this type does not seem to be properly supported ( ...