Switching to very high sample rate audio device on XBox causes crash

UE - Audio - Nov 3, 2022

When switching to an audio device with an unsupportedly high sample rate on XBox, XAudio2System->CreateMasteringVoice will crash. Ideally, it would give a warning instead and swap to the null render ...

Invalid Subsurface Scattering Color when using Per Pixel Shading Model and non-default material layers

UE - Rendering - Materials - Sep 27, 2022

It appears as though when adding material layers to a material instance that uses the FromExpression shading model, the subsurface color ends up white. If you add a DebugFloat3Values and output it t ...

Root component transform is reset after reparenting an Actor-based BP with a non-native root to a parent with a native root.

UE - Gameplay - Blueprint - May 10, 2022

Two conditions for this bug to appear:The new actor class we are re-parenting to overwrites the root component in C++The map is not loaded while re-parenting No current workaround other than to rep ...

Level Variant Bindings are lost when saving level with a different name

UE - Editor - Datasmith - May 5, 2022

When saving a level, that has a level variant asset in it, with a different name, the bindings within the level variant are broken. ...

Display: Missing cached shadermap for Preview:<MaterialName> in PCD3D_SM5, Default, SM5

UE - Rendering - Materials - May 4, 2022

When applying a Landscape Layer Blend of textures to the Material Base Color, the preview does not update or shows black instead of how the material is supposed to look. When you disconnect the lay ...

Assertion failed: (Index >= 0) & (Index < ArrayNum) when importing large Alembic file

UE - Editor - Datasmith - Importer - May 3, 2022

Regression testing done on //UE4/Release-4.27.2 CL-18427296 and this issue did occur. [Link Removed] [Link Removed] Below is snips of customers description and proposed workaround:Importing alembi ...

Rarely, unmodified Niagara will cause diffs and bloat the patch.

UE - Rendering - Niagara - May 3, 2022

Attached is a project that picks up Niagara from the content sample. The probability of reproduction is about 1/10. The simpler the project, the lower the reproduction probability. I am attaching ...

Cannot touch at top of screen after input japanese on UEditableTextBox on IOS

UE - Platform - Mobile - Apr 5, 2022

[translated comment from licensee] This issue can be found in a IOS project using the Integrated Keyboard. it occurs when using a Japanese keyboard on EditableTextBox. There is no problem with Engl ...

Crash when reimporting fbx with import mesh LODs on

UE - Editor - Framework - Import and Export - Mar 30, 2022