Unreal Engine Issues
Unreal Engine Issues
Crash when adding a pawn that has a SetSenseEnabled node set to true on Begin Play and then playing the game
UE - AI - Apr 20, 2021When adding the SetSenseEnabled node to a Pawn and controlling another pawn that has an AIPerceptionStiumuliSource, the editor crashes. I tested using other senses such as Hearing and the crash occu ...
[AI] Crash when gathering heightfield geometry on worker thread
UE - AI - Navigation - Jun 25, 2025From the body of the ticket: We aim to do as much of the work off the game thread as possible to avoid impacting frame rate. We've recently found a crash during collection of the geometry slices fr ...
The Starter Contents SM_Statue exists in a bad state, leading to crashes when trying to open levels where it is referenced
UE - Graphics Features - Ray Tracing - Feb 18, 2025The SM_Statue exists in a bad state leading to a crash when it is loaded or anything that references it is loaded, e.g. Minimal Default level in the Starter Content. It can be deleted as a temporar ...
Intermittent Crash in SGraphNode when saving
UE - Gameplay - Blueprint Editor - Apr 5, 2016Licensee observed crash in SGraphNode after modifying comments on blueprint nodes and saving. Has seen similar crashes before, unable to figure out how to reproduce them. ...
Crash When Substance Material Is Applied to a Mesh In HLOD System
UE - World Creation - Worldbuilding Tools - HLOD - Sep 3, 2018Crash when Substance material is applied to a mesh included in the HLOD system. Working as expected in 4.19 CL# 4033788. Unable to test issue in 4.21 CL# 4339215 due to plugin dependency. Found in ...
Watch Pin Crash on Softclasspath
UE - Gameplay - Blueprint Editor - Mar 26, 2020Mousing over a softclasspath pin from a struct while debugging a Blueprint can lead to a crash. ...
FTabManager::FindPotentiallyClosedTab Crash Due to Invalid Array Indexing
UE - Editor - Workflow Systems - May 25, 2023As you can see from the above callstack it appears that calling RestoreArea can call FindPotentiallyClosedTab again higher in the stack, which can Remove() an entry from CollapsedDockAreas- this cau ...
Inserting before a FSlateImageRun twice will cause crash
UE - Editor - UI Systems - Apr 12, 2019Editor crashes when attempting to play a recorded demo - Assertion failed: IsGameWorld() && GetCurrentLevel()
UE - Networking - Oct 9, 2018Editor crashes when attempting to play a recorded demo - Assertion failed: IsGameWorld() && GetCurrentLevel() This issue occurs when using a template project or QAGame. This does not occur when usi ...
Switcher widget causes a crash when dragging a widget out of it and on to the canvas panel
UE - Editor - UI Systems - Aug 6, 2015If the user adds two widgets to a switcher and then tries to drag one out of it the editor will crash ...