Unreal Engine Issues
Unreal Engine Issues
Crash on packaged dedicated server when a uproperty is marked as both replicated and editor-only
UE - Foundation - Cpp Tools - UnrealHeaderTool - Nov 26, 2024In some situations, it can be useful to have a replicated editor-only C++ property (For example, the user that reported this issue was attempting to replicate settings to the client for game designe ...
Crash when using CastChecked<>(nullptr, ECastCheckedType::NullAllowed) in configurations where checks are disabled
UE - CoreTech - Jun 19, 2025When using CastChecked<>(), the second parameter can be passed as ECastCheckedType::NullAllowed to make the check succeed when the input is nullptr. However, in UE 5.5 up to the latest engine versio ...
Crash when a subsystem calls GetSubsystemArray() on its owner while engine code is iterating on subsystems also obtained through GetSubsystemArray()
UE - Gameplay - Aug 6, 2024In some occasions, engine code iterates over a certain subsystem type by calling FSubsystemCollection::GetSubsystemArray() and then calling some method on all subsystems of the returned array. This ...
Crash when adding a streaming level to the world through Python
UE - World Creation - Worldbuilding Tools - World Composition - Aug 3, 2021When using the Python plugin to add an existing level as a streaming level, the editor crashes. It seems that this happens regardless of what level is added or what the contents of that level are. A ...
Crash in GPUMessage.cpp when resetting FSocket when RHI is NullRHI.
UE - Rendering Architecture - RHI - Apr 5, 2025When tearing down a nanite project with the nullrhi active, there is a crash in the FeedbackManager destructor that causes any exit to be unclean. The teardown process causes a crash as the destruc ...
Cooking crash during shutdown with no useful error
UE - Simulation - Physics - Apr 11, 2023Sometimes some of actors are destroyed after the destruction of the solver through the garbage collector. In this case, the app crash in FChaosScene::RemoveActorFromAccelerationStructureImp because ...
[MetaSounds][Builder API] - Editor crashes when setting node position to a large value
UE - Audio - MetaSounds - Aug 9, 2023Setting the location of a node a the MetaSound Editor Subsystem to a very large value crashes the editor.Unhandled Exception: EXCEPTION_STACK_OVERFLOW Crash reporter link: [Link Removed] ...
Crash when pasting category
UE - Editor - Workflow Systems - Oct 25, 2024The following code example will generate category rows with nullptr assigned to OnPasteFromTextDelegate which causes a crash if the user tries to paste onto a row. Once you have this code create th ...
Crash when using StaticDuplicateObject with mismathced Source and Destination class types
UE - Foundation - Jun 19, 2025Starting in Unreal Engine 5.4, StaticDuplicateObject internally switched to using Unversioned Property Serialization (UPS) for performance reasons. However, UPS assumes the source and destination ob ...
HighResScreenshot crashes in windows packaged exe
UE - Rendering Architecture - Mar 22, 2023FHighResScreenShotConfig::Init() sets the materials only in the Editor, due to a #if WITH_EDITOR block. However, the FViewport class exposes the TakeHighResScreenShot to non-editor builds as well, l ...