Unreal Engine Issues

Object may not be able to go dormant with PushModelSkipUndirtiedReplication enabled

In ReadyForDormancy, we check if the replicator has any change lists or property updates that haven't been acked. However, these checks are not made in CanSkipUpdate, which can result in the object ...

Assert when creating new landscape

Generated from CrashReporter ...

GeometryCollection with StripOnCook and without EnableNanite causes a crash in cooked game

The Strip on Cook option seems to strip even necessary data. ...

Sequencer: Changing a data layer track to KeepState hits ensure(Aggregate) in animated state storage

Ensure condition fires as described in reproduction steps when using a Data Layer track in Sequencer with 'Keep State'. ...

LinkedAnimGraph of AnimBP is not applied to the character to which ForceCustomMode is applied in the sequencer after the sequencer playback is completed

LinkedAnimGraph is not restored at the end of an AnimationSection with ForceCustomMode enabled. There is a problem with the order in which custom mode ends and anim instances are restored, and Linke ...

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

Performance decreases with the number of morph targets

Performance decreases quite a bit on characters with large number of morph targets, as soon as even one target is active.  ...

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 ...