Unreal Engine Issues

Unloading level during PIE leads to editor crash

Unloading level during PIE seems to lead to an editor crash. Most easily reproducible by enabling malloc stomp. ...

Sequencer - Soft References do not work as payloads in Event Track keys, the endpoint event receives none/empty instead

In sequencer, an "event track" can be added to call functions/events defined in the Sequence Director Blueprint. The parameters for those endpoint functions/events can be sent as a Payload associate ...

A build may fail in Visual Studio if a space is added after the # in an include pre-processor instruction to allow a struct in one header file to reference a struct in the other

A project building in Visual Studio will sometimes fail with the error Unrecognized type 'FBar' - type must be a UCLASS, USTRUCT or UENUM. This can occur in situations where one struct was reference ...

Creating a Blueprint using "Event Tick" and adding a "Breakpoint" constrains the user's mouse cursor to the Blueprint editor window when pressing "Play"

When adding a Breakpoint within the "Blueprint Class Actor" editor using "Event Tick," the mouse cursor becomes constrained within the editor window box immediately after pressing Play. The mouse cu ...

Clothing Pops on start and LOD switching

Clothing can have noticeable popping when switching LODs, and there is currently no mechanism to initially start cloth in a resting pose, causing popping on spawn. ...

[CrashReport] GPU Hang on Linux - /usr/lib/nvidia-381/libGLX_nvidia.so.0

This is a trending GPU hang crash on Linux in 4.16 and 4.17. It is similar to [Link Removed] (nvidia-375) ...

Crash when Undo after deleting a Material Layer of a Material Instance.

In Unreal Engine version 5.5.4, the Editor crashes when performing Undo after deleting a Material Layer of a Material Instance ...

Exporting a spawnable through Python doesn't work

CppCompileWarningSettings.NonInlinedGenCppWarningLevel messages should contain Warning\Error

The messages emitted when CppCompileWarningSettings.NonInlinedGenCppWarningLevel is set to Warning\Error should contain the literal so the tools pick them up and react accordingly. From the EPS c ...

Crash importing morph targets with animation and opening it in animation editor

Lina encountered a crash when importing the attached FBX file with morph targets and animation, and then opening it in the animation editor. I was not able to reproduce this issue in QAGame (her re ...