Unreal Engine Issues

Visual Studio builds currently fail when a project includes a UFUNCTION with Server, Reliable, and WithValidation specifiers (with appropriate definitions in the source file).

Using UFUNCTION(Server, Reliable, WithValidation) with an RPC function results in a failed build in Visual Studio. The same test in Main yields a different set of error messages. ...

Widget "Listen For Input Action" executes on unexpected input event

Listen For Input Action firing erroneously. Confirmed in 4.26 MAIN @ CL 11536993 ...

Crash when travelling during ability activation when URL contains "#"

This issue is related to [Link Removed], where the "?listen" option sent on the URL to clients could cause issues with RPCs being called locally during travel. The fix to remove the "?listen" option ...

Ribbon Particle Normals are reversed from default Sprite Particles

It appears that the Vertex Normals from Ribbon Particles are opposite of what is expected via the Default Particle System given both systems share the same alignment (Facing Camera) [Image Removed] ...

Niagara Data Interface "Errors and Warning" section on Module Details not updating when error messages change

This is a regression: it worked correctly up to UE 5.5, but not in 5.6 or mainline latest. Possibly caused by CL 40093049. Class UNiagaraDataInterface provides virtual method GetFeedback(), which a ...

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 ...

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 ...

Packaging for DLC with plugin multiple times causes failure due to file path length

When the DLC is being built for a project and stored in a plugin, the result is normaly until the DLC is packaged multiple times. This leads to the file path becoming more and more nested each time. ...

Unable to change collision profile on static mesh component to a specific profile.

Cumulative Patching does not work with Pak signing

Cumulative patching is implemented by copying the generated pak files during staging of the base and each patch to the Releases directory. When creating a patch, all of the pak files from the releas ...