BP - Class default value is temporary reset after parent c++ class compile.

UE - Foundation - Cpp Tools - Hot Reload - Nov 21, 2017

class default value after c++ class compile will temporary initialized. It will be restored when opening the project again. ...

MoviePipeline Project Settings can't refer to Plugin classes

UE - Anim - Sequencer - Feb 12, 2022

A workaround might be to use the CDO of your plugin to reach out to the Editor settings and assign itself to the fields you want. This removes the users ability to choose between multiple options. ...

Can't set "r.Shaders.Optimize" to false in UE5.4

UE - Rendering Architecture - Shaders - Jun 7, 2024

The CVar "r.Shaders.Optimize" cannot be set to false from DefaultEngine.ini in the section "[ShaderCompiler]" as its help text describes. Also tested on UE5-Main, CL: 34200103 ...

When a Niagara System has SimTarget set to GPUCompute Sim, CameraQuery is only returning data from the Player0 camera, ignoring the PlayerControllerIndex.

UE - Niagara - Nov 8, 2024

When a Niagara System has SimTarget set to GPUCompute Sim, CameraQuery is only returning data from the Player0 camera, regardless of PlayerControllerIndex. The expected behavior would be to have the ...

Actor Dropped at Wrong Location During PIE

UE - Editor - Applied Usability - Apr 3, 2025

When attempting to drag and drop an actor from the Content Browser into the level viewport during PIE, the actor is not placed at the mouse cursor location if the Player Controller is attached. Inst ...

Inconsistent warning with actor root component mobility setting

UE - Gameplay - Oct 27, 2016

When an actor class sets the root component mobility to Static or Stationary, spawning an instance of the class (or child blueprint) during runtime will print a warning message in the output log of ...

Static Meshes in Precomputed Visibility Cells are not occluded by landscape

UE - LD & Modeling - Terrain - Landscape - May 5, 2016

When using precomputed visibility on device for occlusion culling the landscape does not take the cameras view into account for culling objects when out of view of the camera and inside a visibility ...

Using Subversion results in a hanging attempt to sync to source control

Using Subversion on a Mac to connect to an online repository causes the Source Control settings window to hang indefinitely and never succeed in connecting ...

Packaging fails if a Blueprint is set to be nativized but it is not included in a level

UE - Gameplay - Blueprint Runtime - Apr 6, 2017

Packaging a project will fail if a Blueprint is set to be nativized and that Blueprint is not included in a level. REGRESSION: Yes. The project packages successfully in 4.15. ...

Image widget does not scale the inner borders correctly

UE - Editor - UI Systems - Oct 24, 2014

When Scaling in and out in the UMG blueprints with an image applied to an image widget that is set to border as it's "Draw as" selection the image does not scale correctly. EDIT: The UI should prev ...