Unreal Engine Issues
Unreal Engine Issues
Niagara Component can crash if ticked with a null tick function
UE - Niagara - Mar 12, 2021Niagara components don't null check their tick functions, and can cause a crash as a result. Compare to UParticleSystemComponent::TickComponent which does. It's fairly common in the engine to pass n ...
Unloading a spawned Detour AI Controller using Level Streaming causes a crash
UE - AI - Oct 14, 2019In a Level Streaming setup, unloading a level that has spawned an AI Character with a Detour AI Controller causes a crash. This was reported and tested in 4.23 (CL-8386587). This was reproduced in ...
Crash enabling Async Scene and opening level in editor
UE - Gameplay - Jan 11, 2017This is a regression from 4.14.3 at CL 3251583 ...
Crash - console command stat none
Tools - Oct 7, 2020Engine Crash when Running a Screenshot Functional Test
UE - Automation Test - Apr 12, 2023Running a Screenshot Functional test, is causing an engine crash. By attaching a debugger to it, AScreenshotFunctionalTestBase::PrepareForScreenshot() is reached and GEngine->GameViewport is null, ...
Sequencer's View Options>Expand/Collapse Nodes and Descendants (Shift+V) does not Collapse after being Expanded (UE5.6)
UE - Anim - Sequencer - Jun 25, 2025Sequencer's View Options>Expand/Collapse Nodes and Descendants (Shift+V) does not Collapse after being Expanded (UE5.6). As described in the Steps to Reproduce section, the command expands the prope ...
Access Violation crash deleting a Widget Blueprint with an unsaved Animation track - FSequencer::Tick()
UE - Anim - Sequencer - Jun 19, 2017Encountered an Access Violation crash while deleting an Widget Blueprint with an unsaved Animation Track. The callstack references FSequencer::Tick(). I was not able to reproduce this issue in UE4/ ...
Crash in Blueprint when clicking on Component variable name that remains after Component was deleted
UE - Gameplay - Blueprint - Jul 25, 2017This is a common crash in 4.16 and trending in the 4.17 previews. It can be reproduced by clicking on the name of a variable that remains listed in a Blueprint after the associated component has al ...
check(!bPostTickComponentUpdate) fails triggered by UNiagaraComponent::CreateRenderState_Concurrent() and StaticMeshCompilingManager::FinishCompilation()
UE - Niagara - Rendering - Jul 23, 2024Reported alongside [Link Removed] Context: Some ActorComponents can schedule end-of-frame work which UWorld executes later in the frame in UWorld::SendAllEndOfFrameUpdates(). By-design it appears t ...
Crash When opening context menu in sequencer
UE - Anim - Sequencer - Mar 14, 2018Altering a key in an event track that contains a struck with a static mesh variable will cause the editor to crash. ...