Unreal Engine Issues

Blueprint instance with NiagaraComponent cannot keep its user parameters, it will restore to the default values after reopening the level

The ActionInstanceData event is incorrect when triggering a "Started" delegate which is on the same tick as a "Triggered" event

This is happening because the FInputActionInstance has the event as "triggered" when the triggered event and started event occur on the same frame. This is correct, but when the delegate gets fired ...

Duplicating functions doesn't reset the GUIDs of local variables.

This is actually a bug with function duplication via UEdGraphSchema_K2::DuplicateGraph. After a function graph is duplicated, the function entry node still retains the same GUIDs for its local vari ...

UMovieSceneSequenceTickManager does not consider settings of Fixed Frame Rate

Due to CL-20816478 UMovieSceneSequenceTickManager now calculates DeltaTime per Group instead of using DeltaSeconds directly. As a result, the FixedTimeFramerate in the project settings is being igno ...

Emissive map texture is not set to material when building Approximate Mesh from HLOD Outliner

Emissive textures seem to be set correctly in the case of building HLOD in the world partition. However, licensees who do not use World partition seem to build HLOD with HLOD Outliner. [Image Remov ...

Scratch Pad outputting Audio Spectrum triggers a crash

This is a regression. Tested in //UE5/Release-5.1 CL23901901 The editor crashes after playing in editor when the level contains a niagara system with a scratch pad outputing audio spectrum. ...

ShouldOnlyTriggerLastActionInChord only works for one action bound to a chord instead of any number

WorldPartitionActorDescs for LevelInstanceActors are broken when migrating world partitioned level

WorldPartionActorDescs will be restored to the correct properties when resaved. They can also be fixed by the WorldPartitionResaveActorsBuilder commandlet. ...

SplineComponent - setting roll affects tangents

Licensee reports issue with setting roll on a spline component control point. ...

After attach a component to a simulated component by socket miss collisions

If attaches a StaticMeshComponent with collision active to another actor with a SkeletalMeshComponent simulating physics by socket name the StaticMeshComponent miss collision for simulation. Chec ...