Unreal Engine Issues
Unreal Engine Issues
GetPackageLengthForCooking can be much larger than the actual file path length
Tools - Jul 10, 2019If the file path with the asset contains a project name, the cooking file pathlength is incorrectly increased. The following code in ContentBrowserUtils :: GetPackageLengthForCooking causes this is ...
Access Violation - UMovieSceneFolder::PostLoad - Accessing freed memory
zComponent - Archive - Sep 19, 2024A licensee has hit an access violation issue due to a movie scene containing a reference to an invalid child object binding. It triggers in the following method: UMovieSceneFolder::PostLoad // Vali ...
[CrashReport] Assertion failed: !PinRef->bWasTrashed - UEdGraphPin::SerializePin()
UE - Gameplay - Blueprint - Sep 8, 2017This is a common and longstanding crash that has affected more than 200 users since at least 4.15. This crashGroup was previously associated with [Link Removed], but that specific repro case has be ...
Player Controller does not handle multiple CharacterMovement movement modes
UE - Gameplay - Blueprint - Feb 6, 2018From Bug Submission: The variable in the image I attached is unable to distinguish between multiple characters all possessed by the same player controller. So if one character has this variable set ...
When asynchronously loading levels using the "Async Load Primary Asset" node, the dirty flag of the loaded level becomes Enable
UE - Gameplay - Jul 26, 2018Asynchronously loading a level that has one or more Actors using the "Async Load Primary Asset" node will enable dirty grug for that level asset. The cause is a modified code(CL-3764602) for the [L ...
Unreal Insights - GPU Timers don't show on Graph
UE - Metaverse - Profiling Tools - Oct 27, 2023From Customer: UE 5.3 update broke Unreal Insights adding GPU timers into graph tracks. Debugging the code and cross checking with github/p4v I guess it broke in this revision: Timer graphs no ...
DynamicMaterialParameters Niagara module resets write flags on emitter update
UE - Niagara - Feb 4, 2026When using the DynamicMaterialParameters Niagara module in UE 5.6, 5.7, and UE5-Main (CL 50298778), updating an emitter causes Boolean values, such as Index0Float0Write, to reset to default values, ...
Google VR Plugin - Unable to package for Distribution
UE - Platform - Mobile - Oct 19, 2018There is an issue with GoogleVR and Android SDK 26 that only occurs when packaging "For Distribution", possibly connected to the SDK 26 change regarding the UiLayer for VR mode. Packaging without Di ...
Functional Test won't start when placing a moving actor inside the level if setting Navigation Mesh's Runtime Generation to Dynamic
UE - Automation Test - Mar 21, 2019User is trying to use the Functional Test class to construct some automated test cases. Whilst doing this they noticed that adding a BP_Actor (just a static mesh engine cube) that simply rotates (v ...
Rendering of a Text Widget with Outline does not track LayerId correctly
UE - AI Workflows - UI Systems - May 27, 2025Text widget with Outline uses 2 LayerId levels to draw the outline and the text glyphs. This can be seen in function FSlateElementBatcher::AddShapedTextElement(), where lambda BuildFontGeometry() is ...