Runtime float curves not applied in inherited blueprints

UE - Framework - Blueprint Runtime - Mar 13, 2023

LevelSequenceActor sequencer loaded with DataLayer does not progress track when played

UE - Anim - Sequencer - Nov 1, 2023

In UE5.2, there seems to be a problem with the initialization of the reloaded LevelSequenceActor. SequencePlayer->Initialize is not called in  ALevelSequenceActor::InitializePlayer() and Tick regist ...

[MetaSounds][Ladder Filter] - Ladder Filter Produces Incorrect Output when the Sample Rate is not 48kHz

UE - Audio - MetaSounds - Oct 30, 2023

When the Sample Rate of the Audio Mixer or device is not 48kHz, the Ladder Filter output is not correct on PIE. It is Silent at 20000Hz, and other frequencies also sound wrong.  ...

[MetaSounds][Biquad Filter] - Biquad Filter Produces Incorrect Output when the Sample Rate is not 48kHz

UE - Audio - MetaSounds - Oct 30, 2023

When the Sample Rate of the Audio Mixer or device is not 48kHz, the Biquad Filter output is not correct on PIE. It is Silent at 20000Hz, and other frequencies also sound wrong. See [Link Removed] ...

Natively declared Gameplay Tags aren't counted by Reference Viewer when set default by ctor

UE - Gameplay - Jul 11, 2024

Similar to Issue 199247 ([Link Removed]), Natively declared Gameplay Tags aren't counted by Reference Viewer when used in a variable set in a C++ ctor. ...

Substrate Add node only adds the first Substrate Slab's Emissive value when "Use Parameter Blending" is enabled

UE - Graphics Features - Substrate - Jan 10, 2025

As per the steps to reproduce, the Substrate Add node only adds the first Substrate Slab's Emissive value when "Use Parameter Blending" is enabled. Leaving "Use Parameter Blending" unchecked on the ...

Regression: Crash when saving the level blueprint of a world-partition map containing any node with an unconnected input pin of type "Gameplay Attribute Structure"

UE - Gameplay - Gameplay Ability System - Feb 19, 2025

In UE 5.5, when the user attempts to save the level blueprint of a world-partition map, the Editor crashes if the BP contains any node with an input pin of type "Gameplay Attribute Structure", as lo ...

Arrays in UMaterialEditorInstanceConstant are not updated

UE - Rendering Architecture - Materials - Jun 13, 2025

Any UPROPERTY TArray added to UMaterialEditorInstanceConstant will not cause UI updates when elements are added or removed. This is caused by the custom validator created in FMaterialInstanceEditor ...

Extending Montage Segment length causes length to reset to default in new Editor Session

OLD - Anim - Jan 4, 2016

Licensee is encountering an issue where they would like a segment of a montage to end and hold the last frame for the remainder of the segment length. He is doing this by adjusting the End Time und ...

Component tags do not register on actors

UE - Gameplay - Oct 30, 2015

Component tags do not register when checked within blueprints. ...