SpringArmComponent with "Use Camera Lag Substepping" does not handle fluctuating frame rates correctly

UE - Gameplay - Jun 4, 2024

The description of SpringArmComponent's "Use Camera Lag Substepping" option says "sub-step camera damping so that it handles fluctuating frame rates well". However, as noted and explained by a licen ...

Guid reference warnings when using the Take Recorde

UE - Anim - Sequencer - Take Recorder - May 14, 2024

When we record a Take from a level actor, a warning about referencing the same Guid inside LazyObjectPtr.h appears. The functionality of the LevelSequence works as expeced, but when the initial tak ...

USplineComponent still editable in viewport despite setting as "read-only".

UE - Gameplay - Blueprint Editor - Apr 29, 2024

A spline component continues to be visible and editable in-editor despite all attempts to disable the functionality through the component's settings or uproperty specifiers. ...

Editor crashes when trying to focus a muted subsequence

UE - Anim - Sequencer - Mar 13, 2024

It appears the hierarchy is invalid for muted sequences, so there is no context to focus them in.  ...

In-editor hitch when deleting one actor in a world with many loaded actors

UE - Foundation - Core - Nov 17, 2023

When editing a level with many actors (1000+), deleting an actor results in a noticeable hitch: the editor becomes unresponsive for seconds. This hitch becomes longer the more actors are loaded and ...

FKismetCompilerUtilities::ValidateProperEndExecutionPath() was unintentionally removed from compile-time graph validation

UE - Gameplay - Blueprint Compiler - Oct 16, 2023

We no longer include a note/warning when an expected execution path will not be taken in a function graph due to the presence of a return node. This was inadvertently removed by the change that intr ...

The Blueprint compiler is not consistent with UHT when generating DefaultToInstanced variables

UE - Gameplay - Blueprint Compiler - Sep 7, 2023

UnrealHeaderTool and the Blueprint compiler generate inconsistent metadata for object reference variables whose underlying class type includes 'DefaultToInstanced' metadata. UnrealHeaderTool-genera ...

Cannot change collision presets in BP instances.

UE - Simulation - Physics - Aug 8, 2023

Even with the “Editable when Inherited” flag set in the blueprint class static mesh component, the BP instance collision preset cannot be set to one different from the BP class collision preset. The ...

The pak file specified in PakFileRules is not created correctly

UE - Foundation - Core - Aug 8, 2023

The rules by which chunks are created are ambiguous and currently do not ensure that both PakFileRules and PrimaryAssetLabel settings are reflected. In this sample, depending on the PrimaryAssetLabe ...

BP property initialization fast path does not handle non-instanced properties assigned to default subobjects correctly

UE - Gameplay - Blueprint - Jul 27, 2023

Non-instanced object ref properties are incorrectly being skipped at property initialization time when Blueprint class instances are spawned with the fast property initialization path enabled. This ...